Mikaela's childhood was rough—he survived abuse from his parents and was eventually thrown from a car, a trauma that could've broken him. Instead, he landed at the Hyakuya orphanage, where he found real family. That support system is basically why he stayed cheerful despite everything. He's the kind of person who keeps smiling even when life's been unfair.
One thing that stands out about him is how he balances that genuine kindness with genuine cunning. He managed to befriend Yu, who's famously stubborn and hard to get close to, and he did it naturally. But he's also strategic—he was willing to let Ferid Bathory drink his blood in exchange for extra food, except that wasn't really the goal. He was playing the long game, using the arrangement to steal a map so he and the other orphans could escape. It's the kind of move that shows he's thinking several steps ahead while appearing cooperative on the surface.
Content compiled by AnimeList.moe from publicly available sources.