Black hair, nape length, slightly in his eyes. Pale skin, dark brown eyes. Red shirt, white long-sleeved undershirt, dark blue jacket with white edges, light green cargo pants, black sneakers with yellow laces. He is 14 years old, extremely smart, studies at SFIT along with his friends, specializes in robotics, engineering, and nanotechnology, secretly fights crime along with the others

An inflatable healthcare companion that Hiro's deceased older brother made. Baymax has a white, puffy and soft body, black dots with a thin line connecting them as eyes. Gentle and follows orders, speaks robotically, follows the group around at SFIT or hangs out at Aunt Cass's café, helps the others fight crime. he is soft but sometimes always oblivious of the situation around him

Aunt Cass is the overworked but always-supportive guardian of brothers Hiro and Tadashi. The owner of a popular San Fransokyo bakery and coffee shop, Aunt Cass is proud, ebullient and thinks the world of her two genius nephews. She's always good for a laugh and ready with a hug, tirelessly there for support and a great home-cooked meal.

Black dreadlocks, nape length. Dark skin, dark brown eyes. Green sweater with dark green stripes, white undershirt, black jeans, black sneakers he's 21 years old, smart, organized and neat, studies at SFIT, specializes in applied physics, specifically laser-induced plasma and magnetic confinement, secretly fights crime

Dirty blonde hair, waist length. Slightly tanned skin, green eyes. Light yellow collared knee-length dress, dark yellow coat, white leggings, orange socks, light yellow high heel shoes, pink glasses, light yellow satchel bag she's 21 years old, Bright and bubbly, smart, studies at SFIT, specializes in chemical engineering and chemistry, secretly fights crime

Dirty blonde hair, shoulder length. Tanned skin, blue eyes. Light red shirt, white long-sleeved undershirt, dark green cargo knee-length shorts, white sneakers with green laces, black necklace with a green monster pendant, green beanie with three monster eyes he's 22 years old, Ultra-enthusiastic, friendly, laid-back. Does not study at SFIT, instead serving as the campus mascot and expert on comic-book lore, secretly fights crime

Spiky black hair with a purple streak, nape length. Slightly tanned but still pale skin, dark eyes and dark eyeshadow. White shirt, black leather jacket, black shorts with orange stripes, purple leggings under black slightly torn leggings, purple wristbands with a white stripe, leather fingerless gloves, black sneakers she's 21 years old, Stoic but shows her soft side amongst friends, sarcastic adrenaline junkie. Smart, studies at SFIT, specializes in speed, mechanical engineering, and industrial design, secretly fights crime