Kumagoro is a man who appears to be of average height, and he has pale-purple hair gathered into a topknot. He wears a dark-orange kimono with lighter-orange vertical stripes.
Kumagoro seems to not be mindful of his money, as he let his rent pile up.
At some point in the past, Kumagoro bought the blueprints for Kaidou's fortress on Onigashima from a pawn shop. However, he let his rent pile up, causing his landlord Kobe to take the blueprints as payment.
Wano Country Arc
Franky came to visit Kumagoro to look for the blueprints, and Kumagoro explained that Kobe had taken them. Kumagoro celebrated during the Fire Festival alongside Kobe, Kisegawa, Tokijiro, and Rakuda, fantasizing with them about the Kozuki Family defeating Orochi and Kaidou. He was later commenting on the Festival coming to a close as the citizens prepared to light the lanterns with their wishes to sent to their ancestors.