Vango is the oldest brother in the orphanage, but probably not the brightest bulb in the box. He's still very protective of his siblings and would probably take lives for them. He's a little unstable given his background and how he ended up at the orphanage, and some doctors might argue he's some kind of idiot savant, or a crazy genius.
Nobody else would agree though. Children aren't trustworthy.
(Please don't leave creepy cub comments on my young ocs.)