Rena Mamiya

Rena Mamiya/Uca Worm (間宮 麗奈／ウカワーム Mamiya Rena/Uka Wāmu )  The first executive leader Worm assuming the form of Rena Mamiya, a woman whose childhood dream was to sing in an opera. As a result, Uca Worm had an interest in singing requiems to her victims. She has several subordinates as her followers. Three of them (Cammarus Worm, Cochlea Worm and Subst Worm) are shown in their Worm form. The two remaining subordinates only appear in their human, testing Tendou's ability to fight without the Hyper Zecter. Instead of being defeated at the hands of the Hyper Zecter, they were destroyed by Tendou's newly-acquired Perfect Zecter. During the events of episode 39, in a fight with Kabuto, Uca Worm was injured and suffered a loss of memory as a Worm, believing that she was Rena herself and meeting Daisuke who fell in love with her human side. However, Rena soon regains her memories and fights Drake, forcing him to fatally wound her with (Double) Rider Shooting. Shortly afterwards she dies in Daisuke's arms.