I know it's really funny to imagine Ikkan/Quinn never wanting anything to do with Squid Squad or it's members again, but I think it would be equally as funny for him to not want anything to do with the band but still be EXTREMELY protective of his former bandmates.
Like
Beika, talking shit about Squid Squad yet again - Yeah, Nami is such a loser, we all know that her weird eye mask isn't just "something she was born with", what a liar!
Ikkan, grabbing the little shit by the collar with murderous intent - listen here you little troll, Nami is literally the sweetest girl I've ever met and if you talk shit about her again, I'll rip out your eyes and make them into earrings for your girlfriend.
Kikura - oh sweet I need a new pair of eyeball earrings....