The main character of the game. A Japanese-American member of the Global United Infestation Detection and Elimination (GUIDE) team formed by United Nations to deal with Alpha-Worms. Ken’s blood is very special and he is the only one who can save the world from the Alpha-Worms. Due to his special blood, he has been always been separated from other people and trained by his own father Kanbe, the master of his ninja clan. Now he engages in missions with his friend Andy. Through their conversation, you can see how confident and easygoing he is.