Because of Tadashi. He's the one who initially made him. Probably designed it thinking of the kids he might treat. You know. If he'd had the chance to figure....expanding or something. Putting Baymax in hospitals or doctors or clinics or that sort of thing. My upgrades weren't so huggable. I made him armor to fight and fly.

[It's fine. Baymax is used enough to catching Hiro. So the robot merely braces himself and allows her to flop onto him, as he greets her.]

Hello, Nimona.