For her name I'm thinking something that starts with a C or K. She's into a lot of traditionally feminine things (like fashion, makeup), and a lot of people underestimate her, but she can also totally kick your ass. She's also very loyal, and would literally kill for her friends. I'm thinking that she also has a bit of a chaotic side to her like would do something really dumb "just to see what would happen."
(He/him)
Okay for him I think his name starts with a S or M, something like Sam or Matt. Because in the photo he looks like he's in a club, I think he's a party animal who loves staying out late and just doing whatever. He might go out intended to stay at a club, but end up in some 80s themed diner by the end of the night. He might be impulsive and not really think of the outcomes of his actions. But despite his careless appearance, he's a hard-worker and loves to put some real dedication into things he loves.
(he/him)
His name is David. He like to makes deals and is a businessman. His background is that he was going about his day, when he was dragged into the protagonist's mess. He doesn't like romance or sex. He thinks logical. That's all I can think of.
( my pictures are of the same character, and she/her pronouns)