they're orphans Urahara lured in with candy
he experiments on them>>11070126
basically nothing the characters said in the Hollow Arc still applies
I don't think anyone actually realized he was a modsoul though, they think he's just regular soul candy because the only person who's seen him AND has an IQ higher than 80 is the shota>>11075745
are you kidding? Rukia's already gotten a huge powerup
In the Hollow arc and SS arc she was a terrible shinigami and everyone knew it, it was only later on that Tite retconned it into "she's actually really strong, but Byakuya convinced all the captains to treat her like she's weak and useless and give her a shitty low rank so she gets all the easy jobs and she's never in danger"