speaking of i wonder if it's possible for a good cherub to make an "evil" decision and vice versa. I've always thought philosophically good and evil are subjective so the fact that an entire species was predisposed where one is evil and the other is good is just kinda, odd? and bland in a thematic way unless they have interactions that cause this to vary (like with Calliope and Caliborn) but I still wonder how "strict" is that divide

Indeed, Good and Evil are subjective. I mean, look at Aranea. Technically her purpose was Good and Heroic, she just went about it in an absolutely awful way, but she WAS technically doing things for the Greater Good, selflessly, and wanting to become a Martyr to save Paradox Space. I’d say Cherubs can fall into that as well.