I know Rainbow had his whole "traitor" arc and was kinda evil with Void but to be truly honest I don't think Blue or Hypno would give a damn. They both said they wanted to be with him forever before their separate deaths I don't think a little bit of """"villainy"""" (I don't really consider bow a traitor either...) is gonna stop them
Blue would be understanding and pat his head and be like "Hey,hey,it's okay. I've made my share of stupid decisions too. One poorly judged plan does not make you a bad person. It's okay. I'm not mad. I'm right here. I'm here."
Meanwhile I truly believe that if Rainbow had straight up lost it and actually become evil Hypno would've been like "Økåy 💜 yãy" and scribbled over his redemption arc with plans to destroy Void and Origin and then rule the world with Rainbow. Mans morals are a rainbow bendy straw. And as it stands...does he give a fuck? No not one. How many fucks does he give? Zero. Exactly,so shut up. He will be hanging out with Rainbow for all of eternity. Crimes be damned,that is his everything. Bro does not give a DAMN
Rainbow has two hands,neither of them are for Sabre,and Blue and Hypno need to support and love him they just need to okay,ya gotta let them love him despite the horrors <3