Lightstar was one of the founding members of the Brockton Bay Brigade. The Brockton Bay Brigade challenged Marquis numerous times though Marquis would always win.
Lightstar accompanied the Brigade when they went after Marquis in his home, closed in on him, and was taken down after a pierced his shoulder. Fleur caught him before he could fall on the bone spikes Marquis had created. After the battle, Lightstar was surprised to learn that Marquis had a child before he wondered about her age. 
Lightstar later revealed his civilian identity alongside his teammates as the Brockton Bay Brigade was rechristened 'New Wave'.
After Fleur was murdered he left the Brockton Bay and attempted to retire, albeit unsuccessfully, as his power was too sensitive to inactivity, so he assisted local police from time to time. He also started a new family around 2 years before story start.
↑ 3.03.13.2“I didn’t want this for you kids,” he said, quiet. “I’m terrified of it happening to mine.”
I followed his gaze. At the very front of the room, a slender woman with a mane of black hair tied back with a scarf held a child that might have been six or so years old. Another one shifted restlessly at her feet, blocked from my view by the pews. - Excerpt from Radiation 18.7
↑And for the record, I’d say my Uncle Mike is a control freak, strict lines and rules, family disappoints, betrays, or seems problematic? He cuts contact.” - Excerpt from Sundown 17.3
“Because they had me and Crystal as young as they were.”
“I never got the impression that was a big thing,” my Uncle said. “They were… perfunctory in their grandparent duties. There were grudges and frustrations that felt like they weighed heavier on the family. Speaking for myself, I did resent being sent away for my teenage years, made to spend time with problem children. My parents never did apologize.”
“I can see that. It’s such a shame though. Mom says they’re dead?”
“They probably are. My stupid defensive move was to move away. Jess was a part of it. But the team didn’t feel healthy. You all were growing up and then we heard the kids of people with powers could get powers. Your mom seemed to accept it as a given that you’d be brought onboard. Your aunt surprised me by agreeing, and I think that was her move… establishing an unsafe bubble, not pursuing civilian life. Powers as a part of everything. Even the damn home recipes. We argued like hell.” - Excerpt from Radiation 18.7
↑Another one of the heroes. This guy had been outside. He had red-blond hair and a beard, and his costume had black sleeves and legs, with a star at the front. Two glowing spheres hung over his head, and another hung at elbow height on either side of him.- Excerpt from Eclipse x.5
↑ 7.07.1“Reasonably happy,” he told me. “I tried retiring. Turns out that if you neglect your powers-”
“You lose control,” I finished.
“Yeah. My power became hair-trigger. Almost like it was ready to go off if I sneezed. I made a deal with the local PRT. Helping the police, someone to watch the back door when the police kick in the front. I see in the dark, so I sometimes catch things. Couple of of times a month.” - Excerpt from Radiation 18.7