Koichi

Koichi aka the Worm Orphnoch was a tryout for the Lucky Clover and an antagonist in episodes 22 and 23 of Kamen Rider 555.

Kamen Rider 555
Koichi was one of the Orphnochs who applied to Saeko Kageyama for the vacant position in Lucky Clover created by Mr. J's death. He fought against the Kamen Riders and was destroyed by Kaixa's Xeno Clash.

Kamen Rider Decade
The Worm Orphnoch was one of the members of Dai-Shocker sent to the World of Black RX. He was destroyed alongside the Ox Orphnoch and Frilled Lizard Orphnoch by Diend's Dimension Shoot.