>>545837928
They have different last names, so probably not

Subaru is the lead member of Arius who stayed behind in Arius to give shelter to all the arius mobs who couldn't ever move on and couldn't make it in the real world, the street urchins who can't live properly in other academies. She's not quite on par with The Squad, but out of the remaining Arius members she's the one considered the best candidate for leader left currently after the Squad ran away.