|This article is about a/an rider in Kamen Rider Decade.|
World of Blade
He is an employee of BOARD, originally Rank King but recently promoted to an Ace who has the ability to transform into Kamen Rider Leangle with the sealed Spider Undead. After he is promoted to Ace and Kazuma is demoted, he starts treating him badly while developing a superiority complex. Mutsuki is the last Rider to lose his Rider System along with Hishigata, learning of Chalice's true identity as he and Hishigata have their life energy used by Hajime to create the Joker card.
World of the Rider War
Leangle later appears in the World of the Rider War, fighting with his fellow Kamen Riders from the World of Blade against the Riders from the World of Kiva, though it is unclear whether Kuroba survived the incident in his world or if a new Leangle was chosen. This Leangle was killed by a combined attack from the Thorn Fangire and Wataru, grief-stricken over the death of Rising IXA. Though not seen again, Leangle was presumably restored along with Kazuma and all the other Kamen Riders in the Rider War after Decade was killed by Natsumi as Kamen Rider Kiva-la.
Kamen Rider Leangle
- "Open Up!"
- ―Transformation announcement[src]
- Punching Power: 3.0 t, 300 AP
- Kicking Power: 4.9 t, 490 AP
- Maximum Jump Height: 30 m
- Maximum Running Speed: 100 m/5 s
- Tapir Remote: 2200 MP (22 t)
- Polar Blizzard: 1200 MP (12 t)
- Bee Stab: 400 FP (4 t)
- Squid Smog: 2000 MP (20 t)
- Rhinoceros Rush: 800 FP (8 t)
- Dragonfly Float: 1000 FP (10 t)
- Blizzard Clash: 2400 AP (24 t)
- Blizzard Gale: 1800 AP (18 t)
- Spinning Dance: 3600 AP (36 t)
- Screw Rush: 1400 AP (14 t)
- Blizzard Venom: 3800 AP (38 t)
Ace Form (エースフォーム Ēsu Fōmu) is the default form of Kamen Rider Leangle assumed by using the Leangle Buckle and Change Spider Rouse Card. The transformation fuses the user with the DNA of the Spider Undead. Leangle's Ace form has higher ability parameters than Blade and Garren, allowing him to compensate for the fact that he cannot assume other forms like them.
- Leangle Buckle: Leangle's transformation device
- Rouse Cards: Allow Leangle to perform special attacks
- Leangle Rouzer: Leangle's personal weapon
- Green Clover: Leangle's Rider Machine
Behind the scenes
- Mutsuki's surname contains a pun to his Kamen Rider identity: if one was to elongate the "roba" kana, it would make the name "Kurōbā" (クローバー), the Japanese spelling of the word "Clover"
- Kamen Rider Decade