Known as "the Shadow Thief," Popple dreams of becoming a super thief and being rich beyond belief. He says "see?" at the end of most of his sentences. He has a violent temper, often shouting and becoming angry when encountering someone in the way of his plans. He is also shown to hold grudges over previous fights, frequently getting into arguments with others. He is very greedy, seeking treasure and riches to sell for financial gain. He also has a large ego.