His face always looks like that. It wasn't like that when he was younger. The 'melted' look is a bodily response to an extreme surge of certain chemicals in the body. For most of his kind, the surge comes from violent outbreaks (even if violent, doesn't always result in melt-age), which usually results in them having to wear a tag somewhere on the face. This response can also be triggered by other things (which would be his case) but due to his childhood and relations, they'd put a tag on him if he had been in the public eye when the 'melting' happened anyway.

He went to business school because his step-mom wanted him to (so he could take over the family company, like his dad wanted), but he ended up working the night shift at a convenience store in a sketchy part of town after he went missing.

He despises his dad - his dad wasn't a bad parent, just wasn't around much since he was the CEO of a big company. He did teach his kid stuff, like parents do, but turns out that stuff was, very illegal and traumatizing for anyone.

His mom left when he was about 5-6 (In front of him. She left because she felt something was off about the man, which she was right, turns out he was a serial killer. The 2 weren't married and hardly anyone knew the relationship between his 2 parents. Said she'd visit friends and come back to pick him up, never did. She married a different man and had a kid. Mr. Night Shift likes his step-dad a lot and he is also very close with his younger brother. The relationship between him and his mother is in shambles and will stay that way. Don't worry though, he also has a pretty fun group of friends which picked him from the streets and basically adopted him.