|Age||12 (Season 1), 13 (Season 2 and FusionFall), 14 (Season 4), 15 (Season 5 to 8), 16 (Season 8 to present)|
|Nano Item||Head band|
|Voiced by||Jason Anthony Griffith|
Kay Hyken was born was born in Japan,sometime between 1996 and 1994(I haven't chosen yet),he was said to be born in Osaka,Japan(reference to Naoto Ōshima). To Naoto Hyken(another reference to Naoto Ōshima) and Nara Hoshino now Hyken(reference to Katsura Hoshino and Nara Mikami wife of Akira Toriyama).After living in Japan for four years,his family moved to Africa, while his parents were in Kanya,Kay stayed in the village of Ejersa Goro, in the Harar province of Ethiopia.(reference to Haile Selassie I,no I don't think he's God.).Months later his family moved to England,for two month.His family them moved to Mexico City,Mexico for a year,cause they need a new Hyken tower there.Last at age 6 he moved to New York City where he met Cathra([]),who would later be his best friend.
Kay is level-headed and cool and usually isn't bothered by things, though he does love a good fight. He is something of an epicure, as is his friend Cathra. Kay often acts lazy, but always gets the job done right. He is always ready to help a friend. Kay is definitely a lady-killer, because his good looks and charms. Kay is often comically cruel to his best friend, but shows a soft side for him, always helping him and calling Cathra his "Soul Brother."
- Daycare owner
- Mutant Group Boss
- Driving Instructor
- Calendar Model
"Dude, this class is racist!"
"I understand your hate right now, but this is not the time."
"Cathra, we are the only ones who can do it."
"Cathra, we're in a girls' school! I knew I should have read the full page instead of how likely you are to graduate!"
- He also appears in FusionFall, which takes place in Season 2 of the anime Unreal and is also the main plot for the game, Kay Hyken Chronicles.
- Kay finds out that Fuse's DNA was used to keep Kay alive as an infant.
Brazilian Jiu-jitsu Kickboxing Judo Greco-Roman Wrestling Various forms of Karate including Doppo's Shinshinkai Aikido Sambo Street fighting Jujutsu Boxing Military fighting tactics of Green Berets, Navy Seals, and Army Airborne Rangers Muay Thai Yoga Taekwondo Chinese Kung Fu Israeli Krav Maga The Forces of Nature itself
- Kay’s birth in Osaka is a reference to Naoto Ōshima, as is his father’s first name.
- Kay’s mother’s first name is a reference to Nara Mikami, the wife of Akira Toriyama, while her maiden name is a reference to Katsura Hoshino
- Kay’s staying in the village of Ejersa Goro, in the Harar province of Ethiopia is reference to Haile Selassie, the former emperor of Ethiopia.
- Kay’s taste in food is a reference to Monkey D Luffy
- Kay’s love of fighting is a reference to Goku.
- Kay’s devotion to his friends references Haru and Sonic the Hedgehog.