A popular star around Donut Pond along with his brother and sister, Koroppi and Pikiki. The energetic Keroppi loves adventures! He is not good at swimming like a frog (breast stroke) but he is a great freestyle swimmer and he is great at singing! Keroppi's father is a doctor at Hasunoue Hospital and his mother is a fantastic chef who runs her own small restaurant. Keroppi's older sister Pikiki is a real cutie who loves climbing trees and is good at cooking. Keroppi's little brother Koroppi is hardworking and looks a lot like Keroppi! They all live in the Kerokero House on an island in Donut Pond.