yesss! perfect perfect, they could've been some kinda three musketeers, amigos, golden trio group around that age, since the girls were always together until ~astrometry was sent to the neuro academy. cordelia passed about 10 years ago, and sara is modeled after her at that age, so she's permanently 21 instead of the 30 she should be. so if he has no idea that cordelia died, she'd either look like she aged very well or is her little sister. or, y'know, is a robot clone. sara wouldn't know him until adalia comes back into their lives, so that could make for some interesting and a little awkward interaction!