Hiro was surprised as he checks Baymax's person, who was created by his older brother.
Hiro's Diagnosis by Baymax
Hiro creates the perfect suit and power for his friends and Baymax.
The original Marvel Comics Hiro
The original Hiro on duty
They checking the record at Krei's Abandoned Facility.
Hiro show his friends the drawing of the symbol.
Hiro was shocked during escaping the warehouse from Yokai
Hiro's breakdown, that Professor Callaghan got Tadashi killed and doesn't care that he tried to save him or that he's dead, as this reveal and those hurtful words filled Hiro with complete rage for revenge.
Hiro and Tadashi got caught by Police at the start of the movie
Hiro and Tadashi being grabbed by the ear like schoolboys by Aunt Cass
Hiro showing his microbots to the college and his family
Hiro angrily chastises the team for ruining his plan to avenge Tadashi, and for letting Professor Callaghan get away after what he did to Tadashi, putting a problem in his friendship with them.