Tadashi Hamada

Tadashi Hamada is the older brother of Hiro Hamada and the tritagonist of Disney's 2014 animated feature film Big Hero 6. A gifted robotics student at the San Fransokyo Institute of Technology, Tadashi is the creator of Baymax, the robotic Personal Healthcare Companion.
Tadashi's sudden death in a mysterious fire catalyzes the events of the film, leading Hiro, Baymax and Tadashi's best friends to band together to investigate the "accident" and catch the culprit responsible for it.
== Background ==
Tadashi Hamada is a brilliant inventor and the older brother of Hiro. Together, the two live with their aunt Cass in the beautiful city of San Fransokyo. Their parents died 10 years prior to the events of the film, growing up together in Cass' cafe and bakery. Tadashi was also a student at the San Fransokyo Institute of Technology and worked alongside his best friends Wasabi, Go Go Tomago, Honey Lemon andFred under the guidance of their mentor--the world-renownedProfessor Callaghan.
Aside from innovating and inventing, Tadashi spent his days with his little brother and best friend Hiro and often made attempts to convince the young prodigy to use his intellect to do great things. Under Callaghan's guidance and with the funding of San Fransokyo Tech, Tadashi now has the means to create useful technology that could change the world--an opportunity he eventually seizes to create Baymax.
== Personality ==
Incredibly kind, encouraging and hard-working, Tadashi is considered the epitome of a great brother, nephew and student, always there when people need him. He has an energetic sense of humor and can be silly and excitable.
Tadashi is very hard-working and very intellectually gifted. He does not believe in "dead ends" and values hard work to accomplish goals. He also has a large understanding of health and medicine. Ever the optimist, he successfully balances this rising career in cutting-edge technology and providing moral and emotional support for his younger brother Hiro while keeping a good attitude and a happy smile. He also even appears to be athletic and he is known to have taught Hiro some karate; Baymax's statement that Tadashi was in 'excellent health' also indicates that he is physically fit.