Baymax is a big robot that is basically a big vinyl balloon that Tadashi built to be a healthcare assistant. He's completely harmless without his armor, though he can talk? If that's a deciding factor. He's got about the same level of sentience as like... Somewhere between an Aperture core and Wheatley.

Idk if that is selling it or not. Plenty harmless but maybe too sentient? Idk. I can switch back to Legos if that is easier.