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.