Ken

As a master of knife throwing, this talented teenager serves as the primary executioner for the Nijū-Mensō group, focusing on the final stages of their missions rather than the initial planning. He shares a deep, sibling-like bond with Chiko, whom he affectionately nicknamed by shortening her original name. Having personally trained her in the art of weaponry, he acts as a mentor and protective older brother figure to the group's youngest members.