|Dub Name||Justin Kaido|
|Nickname(s)|| Split Second Killer Emperor (秒殺の皇帝)|
|Game Debut||Danball Senki (PSP)|
|Anime Debut||Episode 09 (Original); Episode 01 (Wars) (Wars, shadowed)|
|Appears in||Anime, Game, Manga|
|Voice Actor||Hisafumi Oda|
|Age|| 13 (debut)|
|Relatives||Yoshimitsu Kaidou (adoptive grandfather)|
|Occupation|| Student, LBX player|
Cyber Lance Test player
Kamui Daimon Harness Vice-Commander
|Affiliation(s)|| Innovator (defected)|
Seeker, NICS, Cyber Lance
|LBX:|| The Emperor, Emperor M2|
Proto Zenon, Zenon, Triton
Ikaros Zero (temporarily borrowed)
|Achievement(s)|| Angra Visdas Runner-Up|
2050 Artemis Runner-Up
Akihabara Kingdom Finalist
2051 Artemis Finalist
Jin Kaidou (海道 ジン) is one of the main protagonists in the Danball Senki and one of the main supporting characters in Danball Senki W series. He then reappears as a support character in the Danbal Senki Wars as Harness' vice-commander, and soon to be allied with Jenock.
Eight years prior to the current setting of Danball Senki, Jin's biological parents were killed when the Tokio Bridge collapsed. At the bridge, he was publicly adopted by Yoshimitsu Kaidou and thus became Yoshimitsu's grandson.
AppearanceJin is a paled, slim young man of average height. He has black hair with a grey-white streak on the right side. He has red eyes and wears a black and purple suit outside of a white shirt and a grey vest. He wears a pair of maroon skinny jeans and dress shoes.
As a little child he used to wear a white t-shirt with red sleeves, khaki shorts, black socks and trainers. His hairstyle was almost the same.
In Danball Senki W, he wears jeans and a teal shirt to match his new LBX, Triton, with a black and purple vest over it. His hair also grows a little.
In WARS Jin wears a white t-shirt with black vest, gray pants and navy blue jacket. His hairstyle appears slightly different. He also has a silver pendant.
PersonalityKaido Jin is a prodigy with a high degree of knowledge in technology. He is distant from others and tends to be silent, but he enjoys playing with LBX. Because he was raised from the rich Kaido family, he has a very social polite manner towards people, friends and otherwise. After becoming friends with Ban Yamano, he becomes more open.
Jin first debuted in Episode 10, where he's seen going to school in a fighter jet, making everyone surprised at his entrance, especially by Daikoji Ryu, and makes eye contact with Ban Yamano. Later, he's seen underneath Blue Cats Cafe, battling 3 Zuul using The Emperor.
He then appears in Blue Cats Cafe, entering the Underground Vicidus Tournament, but ends up losing to Ban because LBX was overloaded since it could not keep up with his quick manual control. And after his loss, he tells Ban the information that could help find his father.
Danball Senki W
He becomes Jessica Kaios's coach, chosen by Otacross. He wanted to show her that even if she is a good LBX player, she still has much to learn. Thus, he gives Jessica Triton's weapon to wield at Angratexas. At first, Jessica had trouble handling it. Later, after Jin's encouragement, Jessica uses her photographic memory to win her match. She then admits to how lacking she is in other forms of combat and begins to call Jin "coach".
Danball Senki Wars
In episode 1, he appears, though his face was never revealed, only shadowed.
In episode 7, he is also seen at the same time he reveals himself and reappeared in the briefing room of the Jenock Faction.
In episode 18, he is seen again meeting Arata and the rest of the First Platoon in a billiard club. Mito then introduces him as Harness's vice commander and sub teacher under the code name, Doldkins (ドルドキンス). After that, he also confirms the truth of Second World and declares the alliance between Jenock and Harness.
In episode 19, Mito was talking to him on the phone about Rikuya having the Parasite Key.
In episode 20, Jin meets Mito to discuss about the plan, he shows Mito a recorded clip of Bandit. In War Time, he and Mito command their platoon to retreat, wait for their chance after Bandit is done what they want with Rossius, which makes Arata become angry. At the end of the episode, he is shocked when seeing The Death Forest is now destroyed completely and a door to The Lost Area is hidden underneath it.
In episode 21, he is surprised to see Arata's Overload and tells Mito that this's what the professor has always looked for. After Arata is recovered, he meets up with him and explains what Overload is to Arata.
- He is the first rival and new protagonist to use Knight Framed LBXs.
- His LBXs seemed to be named after kings such as The Emperor and Triton.
- He has two LBXs that can capable of stopping trains,Proto Zenon and Ttiton.
- His hair's colors are same to Ijuuin Enzan of Rockman.EXE's Series, both are rival of his respective protagonist.
- Similar to above, they both are the heir of high conglomerate companies.