Duke

Duke has a laid-back, go-with-the-flow personality. He tries to help Chocola get hearts but doesn't really help at all. He is quite lazy and has a vicious rivalry with Blanca, although he flirts with her occasionally. Other times, however, Duke is quite friendly. He is a bit of a flirt and tries to get together with other frogs. He ends his sentences with "kero", the japanese onomatopeia associated with frogs.