Hanpan is Jack's friend, partner, and occasional comedic foil. As a wind mouse, Hanpan is long lived, experienced, and possesses a dry wit. He provides the wisdom and 'deep thinking' to Jack's more rash actions. Hanpan also serves as a 'tool' for Jack to use, and can quickly hop over small breaches to reach far-away objects. Hanpan also provides a boost to some of Jack's Fast Draw techniques, greatly increasing their damage.