Torarugin

Torarugin (トラルギン) (3): This monster was summoned by Billion to use his possession powers to used a trouble-making student of Gaku's, Takashi, with Gaku unable to fight the monster without hurting the boy. Billion agreed to release the boy if Gaku lets Torarugin possesses him. But Torarugin soon learned that Billion only used him so he can kill Gaku, regardless of Torarugin's wellbeing. After making it even between them, with Billion possessed and exposed to mutual injury, Torarugin fought the Fivemen on his own and was destroyed by the Five Robo.