Adopted from XxArrancarFanxX (I think, I can't find the original record) on theOtaku. In "Pet Projects", he is the medic for a group of stray hybrid kids.

Avery learned about treating minor injuries and illnesses from his adoptive mother, a scientist who participated in the Republic military's splicing experiments. After she smuggled Avery out when he was slated for disposal at the end of the project, they went into hiding until the military tracked her down and put out a warrant for her arrest. Avery escaped but had no idea how to survive on the streets. Veli and Shay found him in a back alley, sick and malnourished, and brought him to the L&F.
A resilient problem-solver with a great memory for details, Avery gives 100% at everything he does. Though normally quirky, generous and helpful, when he's super-focused on a goal, he can be very particular or pushy and gets impatient and terse under stress.

Relationships with other OCs:
Shay - She looks scary, but she gives great hugs. He's comfortable with her.
Tristan - He frustrates him because he doesn't communicate openly. His sarcasm and habit of deflecting when he’s unwell are particular pain points.
Everett - He stresses him out because he yells a lot.
Veli - He's his pal, almost like a little brother.