Ken Ichijouji (一乗寺 賢, Ichijōji Ken?) is a fictional character in the Digimon Adventure 02 anime series. Ken is the final member of the 02 DigiDestined, partnered with Wormmon and holder of the Crest of Kindness. Unlike the other 02 DigiDestined, he lives in Tamachi, which is next to Odaiba. At first the devious Digimon Emperor (Digimon Kaiser in the Japanese version), Ken tried hard to atone for his wicked acts and eventually is helped along the way by Davis and the others. Ken is voiced by Romi Paku (Japan) & Derek Stephen Prince (North America).

Source: Wikipedia