Mettaton
Mettaton from the game undertale is a robot popstar the number one star in the underground because he was the only star there. He hosts shows and stuff but mostly he sings and dances its his passion and he loves what he does. Though he does have a depressing backstory. He use to be a ghost who lived with his cousin he called blooky, though even if he was happy living with blooky and loved blook with all his heart (platonically) he still didn't feel happy being a ghost, he felt stuck, he felt trapped in his own body, he always wanted to be a popstar but back when he was a ghost he had very low confidence and was basically a loser, till he met someone named alphys he met the human fan club he hosted. Alphys and him became friends and even alphys helped him with his dysphoria and built him a robot body that he felt comfortable and confident in. Then he transistioned to an aloof ghost to a robot (he is trans). After two years of being a star in the underground and performing gaining lots of fans and become for confident day by day. Frisk the human came and he battled frisk not because he didn't like human but because he wanted to be the hero of humankind. Frisk won but he wasn't too sad. After that when frisk freed the underground he went to reunite with blooky and went to the surface where he continued being the greatest popstar with millions of adoring fans. (p.s. he does not like being reminded of the past, it makes him sad)