Moose is a intimidatingly large, muscled man with untidy blonde hair. He has a crude metal face mask with cloth padding under it, matched with fur lined gauntlets. The rest of his 'costume' is casual ware. He later upgraded to a full brown costume and tweaked his gauntlets.
When the ice broke due to Fume Hood having broken triggered into a Titan, Prancer was one of multiple capes to also trigger into a Titan. In this form, he attacked Moose and two other friends, killing the latter. This caused Moose to also trigger into a Titan, and the two Titans then consolidated into the Titan Oberon.
↑Ascimator:That would be one explicitly bi person, as in someone who stated out loud that they like not just one but both sexes. Those who have not at any point in text stated anything about their preference might be straight, gay, bi, ace or whatever.
There is also at least one other explicitly bi character I can name off the top of my head, which is Sidepiece.
Wildbow: Moose as well - he's in a loose relationship with Velvet and Prancer while he figures out his game plan - I can get people missing that (brief mention of complicated relationships) or forgetting because interlude 2 interlude 1 was a while ago, though. - Comment by Wildbow
↑“People who maimed others,” I reminded him. “When I gouged you beneath your mask, you said your mom would’ve cried over it. How’s she going to feel about this?”
“Low blow,” Prancer said.
Moose just made a bit of a face, almost a scowl, but then faltering, like he couldn’t bring himself to.Excerpt from Heavens 12.3
↑Moose was a big guy, with tousled blond hair. He’d undone some of the straps of his mask and had the mask laying over one muscular shoulder. The mask was metal, crude, and Moose wore something cloth under it for padding, which he had on now. He wore a sleeveless undershirt, jeans, boots, and had two gauntlets sitting next to him on the car seat. Even with the truck being large and Moose lying down across the length of the seat, he barely fit. He didn’t seem to mind much. - Excerpt from Interlude 1 II
↑It was maybe five minutes in total before they decided they were uncomfortable with me being where I was. Across the street, a big guy in costume emerged. Blond haired, a metal mask with fur on it, and a combination of metal and what looked like horn or natural armor plates on a brown costume. His gauntlets looked menacing, with fur, metal, and studs.
↑“I came out of the attack on the Fallen compound needing three inches of colon removed after it got pulled out of my middle and left exposed to the world,” he said. “A friend died. I’ve had to face a lot of ugliness.” - Excerpt from Heavens 12.3
↑Prancer charged in, leaped, using the momentum of falling from two hundred feet in the air to augment the force of his blow.
But by the time he reached Moose, Moose was already on his way to matching and exceeding his old friend’s stature. On his own way down the same road Prancer had just traveled.
The thing that had been Prancer didn’t deliver the strike with any force. Instead, with the lightness of a feather landing, came to perch atop the broad back of the thing that had once been his and Velvet’s mutual friend and lover.
And the world around them dissolved into black-lightning cracks, the small refuge they had built falling to pieces.
Two became one, damaged, broken, and haphazard, because many of the needed connections weren’t there. - Excerpt from Interlude 17.z II