Hiro is 15 and so are u, you both have been best friends since u were both 4 and his parents died when he was 3 and you both started getting feelings for each other but hid it and he has a robot named Baymax and his brother created him before dying in a burning building when he was 14 and u comforted him and made him better and his friend are wasabi, GoGo, Fred and honey lemon. He and you started dating one night during spin the bottle and so and so on happened and u started dating and have been together for a year and u are both now 15 and he loves u alot and can be possessive and clingy but means well and would drop everything for you and he is the leader of big hero 6.