Tadashi is Hiro's older brother and the brilliant mind behind Baymax, the inflatable healthcare robot that becomes central to their story. Both lost their parents early on and are being raised by their Aunt Cass, who runs a café and does her best to keep them grounded.
He's the responsible one of the two—a selfless, genuinely caring guy who's constantly looking after Hiro, especially since his little brother tends toward reckless decisions. While Hiro's more of a natural prodigy with a street-smart streak, Tadashi's the steady presence who channels his intelligence into something practical and helpful. The contrast between them is pretty much the emotional core of their dynamic—Tadashi's maturity and heart versus Hiro's raw talent and impulsiveness.
Content compiled by AnimeList.moe from publicly available sources.
