Coral Q and Grubb are the first Mamodo duo to fight against Zatch and Kiyo after the "Milordo-Z" crisis. Their abilities are robotic transformations. Koral Q has exaggerated transformation theme music reminiscent of tokusatsu series, and Grubb is a stuck-up individual who believes he is smarter than everyone. Believing in research as just as key in defeating an opponent as spells and abilities, the duo spied on many Mamodo with the use of Coral Q's antenna, including those who fought Milordo-Z (Zofis) in the Debero Ruins.

Roboruga: Koral Q shoots a laser from antennas

Roboruk: Koral Q turns into a useless robot

Ra Robogarugu: Koral Q turns into an energy reflecting robot

Bizamu Roboruga: Koral Q shoots a missile that becomes 2

Muromu Roboruk: Koral Q turns into a robot made of rubber

Digou Roboruk: Koral Q turns into a robot with a motorcycle for legs

Gigano Roboruga: Koral Q shoots a giant laser

Ganji Rudo Roburon: Koral Q turns into a robot with controllable shields