Captain Grimothy "Grime" is a major character in Amphibia. He was the captain of the Toad Army garrison of Frog Valley's Toad Tower until the destruction of the tower. He was branded a fugitive for abandoning his post, and planned with Sasha Waybright to overthrow King Andrias. However, after finding out that the king is a megalomaniacal tyrant that seeks to use the power of the Calamity Box to take over all worlds, Grime decides to form a rebellion against him with Sasha and the citizens of Wartwood Swamp.