|This article is about a/an Imagin in Kamen Rider Den-O.|
- Motif basis: Lion, Roman gladiator
- Contract holder/host: Kai (カイ)
- fable basis: The Man Who Found a Gold Lion
- Rider Ticket date: January 19, 2006
- Destroyed by: Kamen Rider Den-O Liner Form's DenKamen Sword RyuGun Mode
The Leo Imagin is Kai's subordinate and uses his three Leo Soldiers (レオソルジャー Reo Sorujā) to kill Momotaros, Urataros, and Kintaros in the Time Station while he handles the task of killing R-Ryotaro Nogami upon fulfilling his part in Kai's plan. But Yuto Sakurai drives the Imagin away with his attack and Momotaros, Urataros, and Kintaros use their versions of Den-O's finishers to destroy his Leo Soldiers. When Den-O Sword Form appears, the Leo Imagin travels back in time through Kai with Den-O in pursuit. But before the fight could start, Momotaros loses his sync with Den-O, leaving Ryotaro to assume Liner Form and fight the Leo Imagin, using the DenKamen Sword's RyuGun Mode to destroy him.
- Main article: Leo Soldiers
Leo Soldier Yummy
Leo Soldier Yummy (レオソルジャーヤミー Reo Sorujā Yamī): Cell Medal recreations of the Leo Soldiers appear as part of a Combatman Yummy (戦闘員ヤミー Sentōin Yamī) army, the product of Shocker Combatman In Sendo's desire for like-minded allies to defeat the Kamen Riders, based on the grunts from past villainous groups who fought against Kamen Riders, whom Sendo refers to as the "past generation combatmen" (歴代戦闘員 Rekidai Sentōin). They fight Kamen Rider OOO but are eventually all destroyed by Kamen Rider OOO Tajadol Combo's Magna Blaze Giga Scan.
Behind the scenes
Leo Imagin was designed by Yasushi Nirasawa (韮沢 靖 Nirasawa Yasushi).
- Leo Soldiers are remodeled from ZECTroopers' costumes.