- "The only definitive intel on Hidora Kai includes his strong connections to dangerous people, his deep pockets, and his place as one of the heads of the Five Knights. Hidora embodies what it means to fear the unknown."
- — In-game biography
Hidora Kai is a character featured in Call of Duty: Mobile and was added in the game on October 20, 2020 during Season 11 Anniversary as part of Halloween Draw Redux.  Hidora Kai is also an important character in the Comics, where he is an antagonist.
Hidora first appears in the Season 11 Anniversary comics. Revealed to be an underground criminal magnate, he is shown to be meeting up with a disguised Mace in Alcatraz. The pair starts to plan out their next moves, disabling all electronic devices in the world, including military radio towers, communication centers, Mara and Soap's convoy and even the plane Ghost and Tank were flying in, using the EMP launched earlier. The operators survive the attack and they all rendezvous at The Club.
Later on, he appears again in Alcatraz, this time the place being stormed by Mara and her team. He then engages Mara in a brawl while her team finds the command center rigged to blow. During their fight, Hidora loses the laptop to Mara, but barely manages to escape when the explosives go off and the building starts falling apart. In the aftermath, Hidora is shown to have escaped on a boat.
Hidora is also listed to be a member of the Five Knights, according to Makarov, he is the one looking for corporate benefits.
Like Templar, Hidora rarely (if at all) uses any kind of firearms and seems to prefer his signature katana as his method of offense. He is also a great swordsman, being able to fight Mara only with his katana.
While in Tokyo, Hidora is ambushed by Alex and Soap, and orders his henchmen to get rid of them while he escapes. However, he is intercepted by the pair before he can do so, and is knocked out and carried away by them while his henchmen relentlessly pursue them. But before they can escape, an individual resembling Spectre intercepts them, allowing Hidora to recover and attempt to escape once more. He doesn't manage to get far though, as Soap knocks him out again with a stolen motorcycle. Alex then tells him to get to the exfiltration site.