My character:

Name: Bedelia Hazeltine
Age: 58, but appearance-wise she still looks 31
Strengths:
- Determined
- Not afraid of things getting messy and bloody
- Willing to go very far for her cause
Weaknesses:
- Very rusty moral compass
- Not the best at physical fighting; once her powers have been exhausted, she's done for
- Impatient
- Let's her emotions overrule her rational decisionmaking frequently
'Jobs' in hell: Having been in hell for 'only' 27 years, Bedelia isn't exactly extremely high on the ladder. She was often involved with human summonings and the things that came with that.
Appearance (human) :

Demonic appearance comes a bit later

Name: (demon) Belial (human) Lucian Kane
Age: 213 years, appears almost ageless, could be either in his late twenties or early thirties
Strengths:
- Experienced
- Few things surprise him, it’s hard to catch him off guard
- Extremely imaginative, witty
Weaknesses:
- Very hard to amuse, which results in constant boredom or moroseness
- Insensitive
- Vain
'Jobs' in hell: Deal maker, part-time reaper of souls (a sort of "internship" with a real reaper).
Appearance (human): coming up
Appearance (demonic): coming up