Viola

NOTE
Viola is deeply involved with a personal Hell  redemption au I came up with for funsies. It's very similar to HFIL in  concept, if that helps visualizing what I'm going for here. Said au is  also connected to Pluto, another oc of mine I'll talk about later. Also,  I'm not too well versed in DBZ lore, so his backstory might be very  inaccurate because of that. Oh and Super Buu is usually in Hell for this  one instead of Kid Buu ¯⁠\⁠_⁠(⁠ツ⁠)⁠_⁠/⁠¯ I like him a lot too that's my  excuse. 

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Not much is known about  Viola's past, since he doesn't talk much about himself. It's assumed he  was not a good person when alive, given he was meant for Hell when he  arrived in the Other World. 

Viola is dangerously smart, and is  known to sweet talk his way out of unsavory situations. This ability has  landed him a job as one of King Yemma's aides and, more recently, the  responsibility to look over every major league villain's rehabilitation  while in Hell.

He only sees the former as an opportunity to maybe land himself a spot in heaven, if he does the job well enough – but  Viola also has the innate desire to fix people, whether by helpful means  or not. He fully believes he's capable of making Frieza into a good  person, eventually. 

Viola has found people he genuinely likes in this job, though. Most notably Cell and Super Buu. 

The former seems to enjoy butting heads with the majin more often than not, but  also has a soft spot for him that's not gone unnoticed by either of  them. The latter is one of the few people Viola is  actually kind and patient with – most likely because they are of the  same species, and understand each other much better because of it. 

Truth  be told, Viola's story can only end in two ways: either he will succeed  at his task and be resurrected by the Dragon Balls among his peers, or he will spiral deeper into apathy towards anyone he doesn't care for,  ultimately failing to help anyone. He would still keep the meaningful  connections he'd formed in Hell in either ending, though.