Tadashi Hamada

He has a brother named Hiro Hamada. The brothers were taken in by Aunt Cass sometime after the death of their parents raised in her café "Lucky Cat Café" He earned his own laboratory through hard work at the San Fransokyo Institute of Tecnology. Creator of Baymax a robotic, personal healthcare companion. He have also four friends who study with him; Wasabi (man), Honey Lemon (woman), GoGo (Woman) and Fred (man).

Incredibly kind, encouraging and hard-working, he is considered the epitome of a great brother, nephew and student, always there when people need him. He has a spirited sense of humor and can be silly and excitable.

He is very hard-working and intellectually gifted. Value hard work to achieve goals. He also has a great understanding of health and medicine. Always an optimist, he successfully balances this upward career in cutting-edge technology and providing moral and emotional support to his younger brother while maintaining a good attitude and a happy smile. He is athletic and has taught Hiro karate, he is physically fit.

As the only male figure in Hiro's life, he has carried the burden of responsibility from a young age, knowing that he had to be a good role model. Having to take care of Hiro alongside his Aunt Cass has made Tadashi soft and understanding, although as the older brother, he can still be harsh at times. He is also not above berating Hiro or feeling upset with him, becoming angry at Hiro's unwillingness to try to make something of his life, showing a slightly frustrated side to his personality not seen anywhere else. He encourages Hiro to be the best he can be and supports him in his endeavors.

However, he was also shown to have a goofy, clumsy side to himself. When he introduced Baymax to Hiro and Baymax asked him if he was experiencing any pain, Hiro asked "physical or emotional", causing Tadashi to comically act out. When Hiro ran out of ideas, he grabbed Hiro and shook him upside down to shake some ideas into his head and declared that Hiro needed to "look at things from a different angle" - a philosophy that he has. He is also excitable, as shown when he was happy after finally activating Baymax (after 84 trials) and ran and kissed Baymax.

He values ​​his aunt; He doesn't like to bother her and appreciates everything she's done to raise them, especially if she's done it alone.

Tadashi is a tall, slender, slightly muscular young man with a larger build than others in his family. He has big warm brown eyes and neat black hair cut above his prominent ears. His face shape is different from his aunt and brother, with a longer face, larger jaw, and slightly larger nose.

His most notable physical trait is his preference for a black baseball cap with San Fransokyo Red and Gold lettering. He is rarely seen without this hat, except for a few scenes, such as when he takes off his moped helmet; although he can also be seen without the cap in some family photos at home.

Since he changes his clothes daily, he doesn't wear one outfit much more than others. However, it has many similar items of clothing, only varying in color. He owns several blazers, crew-neck t-shirts, and cardigan sweaters, usually in white, black, tan, red, or various shades of green. He often wears mint sneakers with white soles and laces and occasionally carries a tan backpack.

When introducing Hiro to his friends, he wears a white crew-neck t-shirt with illustrations of a ninja, along with a gray cardigan, brown pants rolled up around his ankles, and his mint-colored sneakers. He wears the same shirt to bed that night, with green plaid pajama pants.

He doesn't care the gender, he just loves you.