Why would ninjas be evil? Seem like traditionalists for hire- LN.

Warriors would be CN, imo. Not bad or good- just enjoy the fight.

Frankly, I am not sure any of the jobs can be considered evil.... there's nothing in the game on the level of the WoW DK quests where you kill children, lol. The game kind of forces you to do good- so everything is kind of Neutral or Good.