A/N: a list of villains laughingstock and Qaaman place as being irredeemable.
Austin: in terms of gaming villains, characters like Dr. Lychee, Hatchiyack, Majin Ozotto, Demgira, Mira, (Unfortunately) Towa and Mechikabura are characters who may not be able to be redeemed for the actions they've done.
And I'll just be using 21 with both halves of her still in one body. That 21 would be a lot difficult simply because, much like buu, she would struggle with the evil side of her whenever she would get angry, or in her case, extremely hungry. The only way it could be gotten ride of is simply by splitting her halves apart.
And even just using evil 21, she cares about nothing more but to eat anything. Especially powerful fighters.
Fu is sort of in the middle when you get down to it. He's not exactly good, but he's not exactly bad either. Things could go either way for him.
For Kanba (or Cunber), Not much can be known about his personality since all that's shown is that he has a rather violent and savage behavior when in battle. And like most other saiyans, he loves to fight. So not too sure about him.