Hiro Hamada (voiced by Ryan Potter) is the main hero of Big Hero 6 and Sailor Moon series. He is the second male member of the inner senshi after Tuxedo Mask/Darien Chiba. He is the younger brother of Tadashi Hamada, the youngest nephew of Cassandra Hamada, the father of Jesse and James Tomoe, and also the husband of Hotaru Tomoe. Most importantly, she is also the son-in-law of Souichi Tomoe and Keiko Tomoe, through a relationship with Hotaru Tomoe. He is also good friends with other characters, such as Twilight Sparkle, Spike the Dragon, Rainbow Dash, Fluttershy, Pinkie Pie, Rarity, Applejack, Princess Luna, Princess Celestia, Princess Cadence, and Prince Shining Armor.
- Younger brother of Tadashi Hamada
- Youngest nephew of Cassandra Hamada
- Friend of Gogo Tomago, Honey Lemon, Wasabi, Frederick, Sailor Moon, Sailor Venus, Sailor Mars, Sailor Jupiter, Sailor Mercury, Sailor Mini Moon, Tuxedo Mask, Sailor Neptune, Sailor Uranus, Sailor Saturn, and Sailor Pluto
- Husband of Hotaru Tomoe
- Father of Jesse and James Tomoe
- Youngest son of Mr. Hamada and Mrs. Hamada
- Son-in-law of Souichi Tomoe and Keiko Tomoe