At age eight, Bobby is a mite small for his age. But what he lacks in stature, he more than makes up for in spunk. A little kid with a big voice, he's always been the kind of boy who gets into trouble because he refuses to act like a little kid. He'll take on any opponent, no matter how huge. In the world of D&D, he is The Barbarian, thanks to the unwieldy club that he wields. It gave him the animal pelt suit and horned helmet he wears. The club also gives him incredible strength but only in conjunction with the club. If a boulder is thrown at them, he can bat it miles away or shatter it into a zillion pieces. He can smash a hole in the side of a mountain or make the earth quake by beating his club on the ground.
Now, Bobby's problem is that he doesn't like taking orders -- not from his big sister, Sheila; not from anyone. He listens to Hank because Hank's the boss and he pays attention like a good soldier. But he sometimes doesn't hear Hank's commands and goes charging off against the Cyclops Monster. The kid is absolutely fearless, is never intimidated by anyone and, therefore, is often getting them into trouble. He's not quite as smart as the others so it's ironic that he's been entrusted with the greatest strength of all. And, since he always doesn't use it wisely, he can cause more problems than he solves.
He is constantly playing David to an endless array of Goliath-like opponents they come across. Villains laugh at his size, unaware of the great power he wields. He gets along great with Diana (possibly even better than with his own sister; Sheila's too timid for his tastes). He respects and (usually) takes orders from Hank. He thinks Eric is a stuck-up snob (he's right) and Eric responds with a W.C. Fields-like dislike for children, especially this one. Bobby doesn't understand Presto and is the most impatient with his botched-up tricks -- while Presto's inferiority complex is done no good by the knowledge that an eight year old is far more powerful than he can ever dream of being. Frequently, however, Bobby's youthful impetuousness gets them into a jam and even the eight-year-old has to admit that he maybe has a lot of growing
Biography copied from Series Bible.