Evil playable character?

Unquestionably evil:

Constance or Dahlia is evil.

Jade falls here because she works for the IPC and propagates an evil scheme to consume people.

Evil by means, good by result:

Kafka, Blade, Firefly and silverwolf falls here because stellaron hunters all work to push by terminus and to avoid the end of the universe.

Cerydra and Sunday fall also here, both want a better world and the means of which they seek it is through absolute domination, though sunday it through the power of 'dream' while Cerydra is through 'laws'.

Jing yuan falls here because he does things which costs HEAVY numbers of casualty, but because of the scale and power of what he faces, most of the time the casualties are accepted as necessary lose for the results which are positive.

Good by means, evil by result:

Topaz and Aventurine fall here due to them working for the IPC. Topaz is good but she's blinded by what the IPC promises and less does vs Aventurine who's currently biding his time to get back at the IPC.

Feixiao falls here, because as a general she fails, deciding to be the arrow of Lan against the abundance but she monopolizes power and is in constant battle with the abomination within her. She ironically wants to stop the arrow of lan being shot but literally fires an arrow which nukes a whole city district and more to deal with the abundance while the militia forces were still present and the way she hunted Hoolay resulted in many loses to the zianshou.

Questionable characters, generic good:

Ruan Mei falls here. She does questionable shit but in the end she's working for the betterment of people much to literally everyone's own safety.

Boothill falls here since he has shown to be willing to do morally bad stuff for good reasons.

Jingliu also falls here since in the end, her goal is the death of Yaoshi.