Belial

From Horny Hell webcomic - https://animefanka-artist.carrd.co/#hornyhell

Name: Belial
Age: roughly 6000 years old
Race: fallen angel
Occupation: Lucifer's assistant

Even before the fall he suffered from really low self esteem. Nowadays he's the only fallen angel in hell still serving Lucifer (and not doing their own thing).
He only recently realised that a single night he spent with Turnida nearly 800 years ago resulted in the two of them having a child. He wants to take more active role in Leo's life but neither of them really knows how this whole father-son thing works.