グレイボン博士

Dr. Gureibon is Aobon's grandfather. His inventions themselves, with the exception of the B-Da Armor, are often trivial, to the extent that Shirobon says they "look like rubbish or junk". However, as a scientist he has reached the level of genius, and has even produced B-Da Armors without blueprints.

He has a weakness for beautiful women.

(Source: Bomberman B-Daman Bakugaiden Wiki)