A lot happened and I actually read them while it was happening but I didn't have the chance to reply so:

About the strongest delinquent thing, psh Rei wouldn't really mind that, she'd only believe it when she sees it but then taking the role as Yoshiaki's [s]concerned mommy[/s] concerned friend, she might feel threatened lmao but I'd be totally cool with the Erza, Natsu, Grey thing. It could totally work with her Friends stahp fighting attitude. The delinquents given a chance to be more theme sounds pretty interesting imo tho.

Hell yeah we're gonna have a cat scene sooner or later but yeah Yoshiaki and Hisaki being at least acquaintances would make sense considering Rei and Yoshiaki are best friends and Rei and Hisaki are rivals.

Also, ok I post my CS once I finalize the relationships area, considering she's gonna be related to half the guardians lol. I'm just gonna add Vongola's chara if we're pushing through with the trio and once he posts his CS