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Riley Grace Davis[2], known publicly as Bonesaw, was a member of the Slaughterhouse Nine.


Childish but largely amoral, Bonesaw lacks any aversion to killing, and even giggled and smiled in excitement when Panacea disabled her creations. As Bonesaw, Jack Slash encouraged her to view her creations as "art" and resist moralistic attempts to limit her.

She couldn't remember her parents' faces.[3]

Her obsession of following her mother's last instructions effected her general aversion to swearing and the bright sunny demeanour that she affected when interacting with others.

She is just as liable to laugh and joke with someone one moment as to carve them up the second.

Riley was a little girl who dearly loved her parents.

Riley eventually concluded her passenger was influencing her personality, which led her to betray the Nine.

Following her mother's last instruction to her, Riley was obsessed with being a "good girl".[3] This led to her adopting a 'cutesy' attitude speaking in a high voice and adopting overly girlish mannerism. In particular, she had an aversion to swearing bordering on a obsession. With a verbal tic constantly telling others not to swear.

In later years Riley is rather upfront about being unable to fully relate to other people.[4]


Has an obsession with rebuilding a family, this influences her choices when nominating people for membership in the nine.

Jack Slash[]

Bonesaw saw Jack as a "father" to the Slaughterhouse Nine's "family", but also feared him intensely. She thought of him as very intelligent and all knowing. She felt a sort of confusion and rebellion towards him..[3]


Shares a borderline mother-daughter relationship with the beast woman. Siberian was often the one to sleep with her as she had nightmares. Though Bonesaw saw the Siberian more as a family pet the beast women felt quite protective and possessive of Bonesaw.[5]


Her longest relationship outside of the Nine, with the similarities in their abilities being a major factor in Bonesaw's interest in the biokinetic.

Appearance and Equipment[]

Riley is described as a young girl with blond hair curled in ringlets, with her dress often stained by blood.

She also usually carries on her dress a full kit of surgical tools such as scalpels. As Bonesaw, she was primarily accompanied by biomechanical "spiders", about the size of a dog; these creations have wetware computers based around brain tissue she scavenges from her various victims.[3] These spiders have innumerable modular functions, being used a distractions,[citation needed] assistants,[citation needed] and an impromptu exoskeleton.[citation needed]

When she returned to her Riley persona with the restoration of her sanity, Riley switched to more unassuming look.[6] She retained her tween appearance for the following years due to complexity reasons.[7]

Abilities and Powers[]

Riley is a powerful biological Tinker, whose abilities make her an unparalleled expert in biological, anatomical, and physiological sciences.[8] As Bonesaw she is capable of creating bio-mechanical constructs with their own powers, these are usually capes she had captured and modified into "zombies", and a variable load out of biochemical vials.

An expert in neuroanatomy, she enslaved and modified capes. She had a limited ability to raise the dead, which she used to produce her "zombies".[9] Her understanding of the Corona Pollentia was unparalleled; allowing her to alter a parahuman's abilities to a limited degree, which she used to remove their control over their power and allow their powers to work together with other capes she had spliced to their body.[10]

Her crowning achievement was the creation of the The Slaughterhouse Nine-Thousand, using materials from Toybox.

She has several accouterments including a prehensile spine [11] and a extendable arm to stab others with.

One trick she frequently employed was a type of white smoke that automatically killed bacteria in her radius.[12] Useful against diseases Bonesaw does not have a cure to and effective against most insects, to the endless frustration of Skitter.

Has the ability to construct wetware computers that can record trigger events.[10] and could turn off the pain she felt through an internal 'switch'.[10]

During the Timeskip, she noted her ability to deploy poisons from vents in her body.[3]

Panacea removed everything Bonesaw had implanted into her body though she did not turn off the pain while she was doing this to make sure she did not miss anything she was removing.[6]

Equipment Features
  • Spider drones
  • Turning a human being into a gun.[13]
  • Safeguards - Bonesaw modified the Nine with various "safeguards"; sheathing their vital organs and major arteries in a protective sub dermal mesh, further wire reinforcement was put into the skeleton to avoid broken bones,[14] with special attention paid to the organs and spine to keep them functioning.[12] She also rendered her teammates resistant to her pathogens,[12] and granting them artificial neurons which allowed them to make plans Cherish could not see, it is unknown if this could be adapted for other Master powers.
  • Damsel's Limbs - created multiple versions as Bonesaw and maintained them as Riley.
  • Clone army - given the systems involved, different tinker tech and multiple generations, it is likely the definition of a megaproject.
  • Plagues - Given preparation, she was capable of creating custom diseases capable of sweeping an entire city in minutes. As well as poisons tailor made to kill people in the slowest most excruciating way possible.[15]
  • The Agnosia Plague
  • Cape Fusions - Murder Rat, Hack Job, Pagoda, Tyrant, Snowmann, Nighty Night, Laughjob



Riley triggered in 2005, at the age of six,[16] when she was forced to repeatedly provide medical care for her family by the Slaughterhouse Nine, injuring them over and over so she would have to heal them again, over the course of several hours,[3] if not longer.[17]


The Slaughterhouse Nine came to Brockton Bay to recruit shortly after Leviathan attacked. Bonesaw nominated Panacea and showed up in the Dallon household to tell her as much.[9] She mentally tortured Amy, making the teen kill several of her creations to show her that she could be destructive with her power. Further, she had one of her spiders inject acid into Mark Dallon's brain after the discussion turned to Panacea's inability to affect brains. She was forced to flee when Panacea proved she was able to heal brains and restored Flashbang's fighting ability enough to force a retreat.

Bonesaw participates in the slaughter of the Merchants by releasing a short term plague among the participants and later stitching some surviving members together into an artistic creation.[5]

She made Grue into one of her "art pieces" with the assistance of Mannequin.[18] This, along with her torturing of his friends and Taylor, eventually caused his second trigger event.[10] The enraged teen villain killed Burnscar and mutillated Bonesaw, chopping off her hands, before helping the Undersiders to escape. She also modified the residents of Dolltown to resemble the Nine in order to provide cover for their escape.

With the intervention of Legend and his team Bonesaw unleashed a plague, an agnosia miasma, on the city as punishment for "cheating" in the Nine's recruitment games. She had a final confrontation with Skitter and Panacea at the hospital before being repelled. She left another group of surgically modified people in the Boat Graveyard‏‎ as a final distraction while the Nine fled Brockton Bay, one of these people being Cherish as punishment for her attempted subversion and betrayal of the Nine.


Fleeing Dragon and Defiant, the Nine recruited Skinslip, Night Hag, and Damsel of Distress, whom Bonesaw surgically modified so she could control her power. Spearheading a raid on Accord's lab the tinker was confronted by Defiant, who stabbed the child tinker in the heart before bisecting her. Nevertheless, Bonesaw survived and kidnapped Blasto along with retrieved samples from the database.[19] A later raid on Toybox gave the Nine access to incredible technology and resources allowing the group to retreat into a private world where they could wait in suspended animation.[20]


During the two year waiting period, before the Nine were revived from cryonic suspension Bonesaw crafted an army of clones - The Slaughterhouse Nine-Thousand - but she began to have doubts about serving Jack Slash and about the distinction between her self and her passenger, prompted by Contessa. She allowed herself to grow up over the years, but reduced her apparent age and partially automated her nervous system before awakening the Slaughterhouse 9000 so as to hide the changes in her personality from Jack.[3]

Gold Morning[]

Bonesaw joined the heroes during Gold Morning, although they didn't trust her. She was paired with Panacea, one of the few that could check her work.

With the lab destroyed she couldn't contribute to the fighting any other way.[21][22]

Post-Gold Morning[]

Valkyrie, 'the keeper of the dead', thought that with the help of Panacea/the Maker, she and Riley would be able to bring back the dead to refill their ranks.

Early Ward[]

Two years later Riley is working for The Wardens, still paired with Panacea and heavily restricted in autonomy[23]. In this time she developed some fondness for Nilbog.[24]

In the last year Riley provided Ashley Stillons with advanced prosthetics and their maintenance.[23]

Post-Fallen Fall[]

After the portal sabotage, Riley was stranded alongside Jamie Rinke, Jessica Yamada, and multiple other Wardens' personnel and ex-prisoners near a remote settlement.[25]

Riley ostensibly was the reason that the most of the people survived, however, she backslided to her old habits,[26] raising suspicions and tension in the camp.[27] It eventually led to her fight with similarly stressed out of her mind Jessica Yamada,[28] shortly after they were found by Valkyrie.

There was found no evidence of other misbehavior on Bonesaw's part,[29] and Riley chose to stay in exile, with Valkyrie making visits as necessary.[30]

Post-Time Bubble Pop[]

She was still active, tending The Flock.

Riley heard about Contessa being captured by Teacher and leaned into her paranoia, making it borderline impossible to contact her without an assistance from the members of the Flock.[31]

The Ice Breaks[]

She was visited by Photon and invited to the fight.[31] Bonesaw accepted invitation, and it was decided that Riley was going to instruct Chris Elman on execution to stay on time.[32]

She provided her opinion on severity of wounds of Victoria Dallon and Byron Vera, forcing Chris to share his emergency supplies.[33]

Following Chris' defection Riley agreed to proceed on her own, despite not having obvious means to deliver results at the moment. She was later recovered by Valkyrie Titan as a part of the deal between Victoria and Contessa.[34]

Her opinion was one of the reasons for the Wardens to attempt to capture Chris Elman during the Victoria's plague deployment.[35]

Ward Epilogue[]

Riley passed the winter in her camp, but returned to The City and The Wardens's custody at the end of the winter. She met Cryptid and Lookout during her visit to the local Wardens' office.[16]

She was provided with a monitored apartment by The Wardens.[16]

Riley informed Dragon about her conversation with Lookout, prompting Dragon to investigate.[36]

Chapter Appearances[]

Worm Chapter Appearances
1. Parasite 10.1 Absent
2. Parasite 10.2 Absent
3. Parasite 10.3 Absent
4. Parasite 10.4 Absent
5. Parasite 10.5 Absent
6. Parasite 10.6 Mentioned
x. Interlude 10 Absent
x. Interlude 10.5 Absent
1. Infestation 11.1 Absent
2. Infestation 11.2 Absent
3. Infestation 11.3 Absent
4. Infestation 11.4 Absent
5. Infestation 11.5 Absent
6. Infestation 11.6 Absent
7. Infestation 11.7 Absent
8. Infestation 11.8 Absent
a. Interlude 11a Absent
b. Interlude 11b Absent
c. Interlude 11c Absent
d. Interlude 11d Absent
e. Interlude 11e Mentioned
f. Interlude 11f Absent
g. Interlude 11g Mentioned
h. Interlude 11h Debut
1. Plague 12.1 Absent
2. Plague 12.2 Absent
3. Plague 12.3 Appears
4. Plague 12.4 Appears
5. Plague 12.5 Mentioned
6. Plague 12.6 Absent
7. Plague 12.7 Absent
8. Plague 12.8 Absent
x. Interlude 12 Appears
y. Interlude 12.5 Absent
1. Snare 13.1 Mentioned
2. Snare 13.2 Mentioned
x. Interlude 13.5 (Donation Bonus) Appears
3. Snare 13.3 Absent
4. Snare 13.4 Absent
5. Snare 13.5 Absent
6. Snare 13.6 Appears
7. Snare 13.7 Mentioned
8. Snare 13.8 Appears
9. Snare 13.9 Appears
10. Snare 13.10 Mentioned
y. Interlude 13 Mentioned
1. Prey 14.1 Mentioned
2. Prey 14.2 Mentioned
3. Prey 14.3 Mentioned
4. Prey 14.4 Appears
5. Prey 14.5 Mentioned
6. Prey 14.6 Mentioned
7. Prey 14.7 Appears
8. Prey 14.8 Appears
9. Prey 14.9 Appears
10. Prey 14.10 Appears
11. Prey 14.11 Mentioned
x. Interlude 14.x Mentioned
y. Interlude 14.y Mentioned
1. Colony 15.1 Absent
x. Interlude 15.x Mentioned
2. Colony 15.2 Mentioned
3. Colony 15.3 Mentioned
y. Interlude 15.y Mentioned
4. Colony 15.4 Absent
5. Colony 15.5 Absent
6. Colony 15.6 Mentioned
7. Colony 15.7 Absent
z. Interlude 15.z Absent
8. Colony 15.8 Absent
9. Colony 15.9 Absent
10. Colony 15.10 Mentioned
i. Interlude 15 Absent
1. Monarch 16.1 Absent
2. Monarch 16.2 Absent
x. Interlude 16.x Absent
3. Monarch 16.3 Absent
4. Monarch 16.4 Mentioned
5. Monarch 16.5 Absent
6. Monarch 16.6 Absent
y. Interlude 16.y Mentioned
7. Monarch 16.7 Absent
8. Monarch 16.8 Absent
9. Monarch 16.9 Absent
10. Monarch 16.10 Mentioned
z. Interlude 16.z Absent
11. Monarch 16.11 Absent
12. Monarch 16.12 Absent
13. Monarch 16.13 Mentioned
1. Queen 18.1 Mentioned
2. Queen 18.2 Absent
x. Interlude 18.x Absent
3. Queen 18.3 Mentioned
4. Queen 18.4 Absent
y. Interlude 18.y Absent
5. Queen 18.5 Absent
6. Queen 18.6 Absent
z. Interlude 18.z Absent
7. Queen 18.7 Absent
8. Queen 18.8 Absent
f. Interlude 18.f Absent
i. Interlude 18 Absent
1. Scourge 19.1 Fantasy
2. Scourge 19.2 Absent
3. Scourge 19.3 Mentioned
x. Interlude 19.x Appears
4. Scourge 19.4 Absent
5. Scourge 19.5 Mentioned
6. Scourge 19.6 Absent
7. Scourge 19.7 Absent
y. Interlude 19.y Absent
z. Interlude 19.z Absent
1. Chrysalis 20.1 Absent
2. Chrysalis 20.2 Mentioned
3. Chrysalis 20.3 Absent
4. Chrysalis 20.4 Absent
5. Chrysalis 20.5 Absent
x. Interlude 20.x Appears
y. Interlude 20.y Absent
1. Drone 23.1 Absent
2. Drone 23.2 Absent
3. Drone 23.3 Mentioned
4. Drone 23.4 Absent
5. Drone 23.5 Absent
x. Interlude 23 Absent
1. Scarab 25.1 Absent
2. Scarab 25.2 Absent
3. Scarab 25.3 Absent
4. Scarab 25.4 Absent
5. Scarab 25.5 Absent
6. Scarab 25.6 Absent
x. Interlude 25 Point of View
1. Sting 26.1 Appears
2. Sting 26.2 Absent
3. Sting 26.3 Mentioned
x. Interlude 26.x Absent
4. Sting 26.4 Appears
5. Sting 26.5 Mentioned
6. Sting 26.6 Appears
a. Interlude 26a Mentioned
b. Interlude 26b Mentioned
y. Interlude 26 Absent
1. Extinction 27.1 Absent
2. Extinction 27.2 Appears
3. Extinction 27.3 Appears
4. Extinction 27.4 Appears
5. Extinction 27.5 Absent
x. Interlude 27.x Absent
y. Interlude 27.y Absent
1. Cockroaches 28.1 Absent
2. Cockroaches 28.2 Absent
3. Cockroaches 28.3 Appears
4. Cockroaches 28.4 Mentioned
5. Cockroaches 28.5 Absent
6. Cockroaches 28.6 Absent
x. Interlude 28 Absent
1. Venom 29.1 Absent
2. Venom 29.2 Absent
3. Venom 29.3 Appears
4. Venom 29.4 Absent
5. Venom 29.5 Absent
6. Venom 29.6 Absent
7. Venom 29.7 Absent
8. Venom 29.8 Absent
9. Venom 29.9 Appears
x. Interlude 29 Absent
1. Teneral e.1 Appears
2. Teneral e.2 Absent
3. Teneral e.3 Absent
4. Teneral e.4 Absent
5. Teneral e.5 Mentioned
x. Interlude: End Mentioned


  • According to Valkyrie, she is the keeper of the "Chirurgeon" shard,[37] a reflection of Valkyrie's use of outdated language.
  • J.C. Mccrae had not read Franken Fran when Bonesaw was conceptualized, she went through several permutations before even being named Bonesaw, but after being told about the Manga he included it on his influences.[38]

Fanart Gallery[]


  1. She has a trump rating. - Reply by Wildbow on Reddit
  2. Interlude 10.y II
  3. 3.0 3.1 3.2 3.3 3.4 3.5 3.6 Interlude 25
  4. She held her hand off to the side, and let the scalpel fall. “I won’t know what I did wrong until you tell me. Some people can put those pieces together, but I can’t.” - Excerpt from Eclipse x.3
  5. 5.0 5.1 Interlude 12
  6. 6.0 6.1 Cockroaches 28.3
  7. Some of those structures were the same ones that kept her apparent age at twelve. She had never gotten around to undoing that, in part because it required her to overhaul so many systems that were hooked into it. She wasn’t sure she wouldn’t end up over a hundred years old and still postponing the change to her appearance. - [1] from Last 20.e4
  8. Wildbow's Parahuman List
  9. 9.0 9.1 Interlude 11h
  10. 10.0 10.1 10.2 10.3 Snare 13.9
  11. Fully? No. But generally speaking, I try to stay one step ahead. If I decide to describe or unveil more of a character (be it their powers or their background), I try to give it some extra thought beforehand and think things through enough that there’s other traits or qualities that aren’t explicitly outlined (but perhaps implicitly).

    The benefit of this is that, generally speaking, I’m not coming up with ideas at the moment I’m putting words to the page, and I’ve let thoughts & possibilities stew in my head for some time before it happens (One example: Bonesaw’s prehensile spine & the other accouterments she has set up in the event of major limb damage – I had it in mind well before Blasto’s interlude, but it never came up during the Nine’s stay in Brockton Bay). - Comment by Wildbow in Chrysalis 20.2
  12. 12.0 12.1 12.2 Prey 14.10
  13. Eclipse x.8
  14. Snare 13.7
  15. Interlude 14.y
  16. 16.0 16.1 16.2 Last 20.e4
  17. Probably. You might be able to say that Jack had her family for weeks/months before finally running her into the ground, and that what we saw was only the final stage. - Comment by Wildbow on Reddit
  18. Snare 13.8
  19. Interlude 19.x
  20. Interlude 20.x
  21. Bonesaw isn’t equipped to make clones. They take some time to grow, anyways. Years to fully develop. Months to reach adolescence. - Comment by Wildbow onVenom 29.3
  22. Sure, but that’s Blasto’s balliwick, not Bonesaw’s. - Comment by Wildbow onVenom 29.3
  23. 23.0 23.1 Eclipse x.3
  24. Interlude 3 II
  25. Sundown 17.6
  26. Riley seemed to have saved us, if anything, by analyzing the food and curing the sickest of us- people I deemed so at-risk that it was unlikely she could do too much. Riley and Jamie Rinke were, to all appearances, angelic, all considered. Some reining in needed, naturally, and it took everything I had to stay on top of it all, especially with my own bouts with illness, but it worked. - Excerpt from Sundown 17.6
  27. Some parahumans, one couple, a jolly fellow who fancied himself a survivalist and who was taking an optimistic view of the situation. He would stop in every day or two, and he hadn’t stopped in for two days. We sent out people to get in touch with him after Valkyrie’s arrival, and they couldn’t find his camp. [...] Terrifying. Crushing. Riley adopted her ‘Bonesaw’ persona, acting younger than she appeared- and with the surgeries she subjected herself to, she’ll never appear older than twelve. Laughing off my questions, being furtive.” - Excerpt from Sundown 17.6
  28. This- a whirl of intensity, Jessica reaching out with a bleeding arm, grabbing a thin wrist, slamming it down into rocky ground until the attacker dropped the blade. Frantic, even though it meant losing traction, Jessica reached out and swiped the knife, sending it flying ten or fifteen feet.

    The hands that grabbed her arms were small. Fingernails dug into forearm, and came away with fine white lines caught beneath small fingernails that had been painted pink.

    Jessica knelt on the offending hand, pinning it down, and strangled-
    Strangled Bonesaw. - Excerpt from From Within 16.12
  29. Everyone accounted for. Everyone checked over. Nothing questionable. If I had to guess, she was protective of her work because it was all she had to show for the prior timeframe and as you say, it was fragile. I’ve gone over that conversation a thousand times in my head, since, and I think she might have misread my tone, or misread my impatience as my wanting her to leave it behind.” - Excerpt from Sundown 17.6
  30. “And Bonesaw?” I asked, quiet. “Is she okay?”

    “Riley is Riley, Victoria. Physically? Even with nearly every bit of her technology removed from her body, I don’t think there’s much someone could do to her with physical wounds that would last.”

    I nodded. I wasn’t sure how to feel about that.

    “Mentally? Emotionally?” Jessica asked. “She asked to stay. Valkyrie tried to convince her. They struck a deal that Valkyrie would visit now and then. She was ashamed she hurt me like she did.” - Excerpt from Sundown 17.6
  31. 31.0 31.1 Infrared 19.z
  32. Last 20.2
  33. Last 20.4
  34. Last 20.a
  35. “And Chris?”

    “They’re going to hunt him down. [...] He was spreading half-truths and they asked Jessica, who asked Riley, who said he was a problem. They’ll imprison him and take away his stuff if they can. Jessica said to, I think, as a compromise.” - Excerpt from Last 20.10
  36. Last 20.e5
  37. Teneral e.1
  38. Massive Franken-Fran fan here.<br
    Bonesaw’s original conception predates my discovery of the manga, though (just to head off the ‘that character’s stolen from ____’ guys.) - Comment by Wildbow in interlude 11h

Site Navigation[]

Slaughterhouse Nine
Leaders King Jack Slash
Members Bonesaw Breed Burnscar Cherish Chuckles Crawler Crimson Damsel of Distress Gray Boy Harbinger Hatchet Face Hookwolf Mannequin Miasma Murder Rat Nice Guy Night Hag *Nyx Psychosoma Screamer Shatterbird The Siberian Skinslip *Winter 
Bonesaw's Hybrids Hack Job Laughjob *Murder Rat Nighty Night *Pagoda Snowmann Spawner Tyrant 
Clones Damsel of Distress II Damsel of Distress III Harbinger Clones  (Harbinger I Harbinger II  • Harbinger III Harbinger IV Harbinger V )