Dr. Gureibon

グレイボン博士

Dr. Gureibon is Aobon's grandfather. With the exception of the B-Da Armor, his inventions are often trivial, to the point 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.