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.
SpoilerRoboruga: 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
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