I am making a bard character, that will be a complete diva, throwing glitter everywhere, hitting on anything that moves, I poured an insane amount of points into charisma, and have chosen the most useless rituals I could find for him, like Dancing lights or Fastidiousness.
The catch is that, although he will be very charming and a goofball, I also want him to be evil, egocentric, hedonistic, possibly even slightly mad (I am debating whether later on I will have him go crazy when he gets even slightly dirty). But he is a performer above all, and he is all about beauty and grace, so I was thinking of making him worship Sune. He technically wouldn't be breaking her commandments, as dead bodies and blood are a form of art for him, as is pain and suffering, so he believes he is creating beauty. I have read on a forum that in DnD things like "evil" and "good" are absolutes, so even if he believes he's doing good, if he really isn't, then, well... he isn't.
I won't have him killing people that often for no reason, he will be more of a trickster of sorts, like Loki in original Norse mythology, doing things to please himself no matter what the cost, and if blood makes him happy that moment, that's what he'll do. I made him sneaky enough, or hopefully charming enough, to stop my companions from suspecting anything.
So, can an evil character like him worship a good deity like Sune? In general, can evil characters worship good deities, no matter the setting?