charas good charas bad. I'm more in the boat: charas bad... however-
the idea of judging characters on a good-to-evil scale in undertale of all games is objectively stupid.
chara hurt. chara vengeful. chara impulsive and not thinking things through. chara maladjusted and suicidal and going too far. with their actions and with asriel's blind trust. chara with save powers like every other human who fell in the underground that eroded their sense of negative consequences for their actions. chara who then enforced those consequences all the more ruthlessly upon themself.
chara who gave up that power and stayed dead for a chance to save monsterkind. chara who could've rebelled to asriel and gone through with the plan, but didn't. chara whose hope for a better future for the monsters shone bright enough that asgore recognized it in frisk's eyes centuries later. chara who brought back that hope to an entire kingdom, and had that burden on their shoulders for the rest of their short life. asriel who, in the game's development, was supposed to be obsessed with the surface and the stars, and a chara who might have wanted their brother to see them for real.
but also, chara as the player's interface. chara as the quantification of our actions within the game, good and bad. chara the feeling of our stats going up. chara the ghost without a soul (just like flowey) who can't stop playing the game until you do. chara the mirror. chara and YOU.
not even our actions in the more violent routes are treated as mere "evil", cruelty or sadism within the game. they're explicitly treated as us going "too far". and because we can, we have to. not being able to quit. digging the ghost out of their tomb until it's too late.
...but sure. chara's "evil".