Villain, Evildoer, Bad Guy, Wicked Person, Evil Person
noun, の adjective
A bad person is a bad person.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
He is a villain, but his hobby is gardening.
Koichi is just playing an evildoer.
Do you really think it’s possible to differentiate between good people and bad people?