He is a light purple and gray elderly fish with a light teal dorsal fin and a light gray mustache. He wears a navy blue coat with gold-colored buttons, and underneath, he wears a lime green turtleneck, a navy blue hat, and black eye patch.
While SpongeBob, Patrick, Squidward, and Mr. Krabs are trapped in the Bikini Bottom Triangle, he is the one who makes all of the Krabby Patties for the customers.
After the group returns, Charles reveals he decided to help maintain the Krusty Krab while they were gone. He also shows that he caught Plankton when the latter tried to steal the formula and trapped him in a jar.
He appears to be one of the very few characters in the series who is more skilled at fry cooking then SpongeBob. This can be evidenced when SpongeBob claims that one of the many Krabby Patties he made was the best patty he has ever tasted.