Exter Raider (エクステル・レイダー Ekusuteru Reidā) was an android bounty hunter that appeared in the series Ultraman Cosmos in episode 41.
Subtitle: Assault Android (強襲アンドロイド Kyōshū Andoroido)
Exter was an android and a bounty hunter that uses his ship Sydevakter to travel the universe to find Green Belt people to exterminate them. On earth, he finds Kasumi Sanjoji, a woman with traces of Green belt plant and tried to kill her but she was taken into custody by EYES. The next morning he ambushed her and tried again but thanks to Keisuke her life was saved and Exter was, ending him. However, he sent a message to his ship to finish the job.
- Actor: Koichi Sugisaki
- His original name never revealed as he was only credited in the series as Planet Exter Android (エクステル星のアンドロイド Ekusuteru-sei no andoroido) until the Tsuburaya All Monster photobook was released.
- His name is a wordplay on "exterminate", which makes sense since his objective is to exterminate the Green Belt people.
- Height: 2 m
- Weight: 1.5 tons
- Origin: Planet Exter of K57 Solar System
- Powers and Weapons
- Strength: Exter Raider is strong enough to throw people and lift cars.
- Extraordinary Jumper: Exter Raider can jump very high into the air.
- Sydevakter: Exter Raider possessed a ship which can transform into a robot. If he failed in his mission, Exter Raider will summon his ship to finish his job.