Jack

Jack is a Jackalope. This may be why he is called "Jack." If this isn't his real name, his real name is unknown. He resides in the Liverpool Avalon, but is originally from the United States. He hangs out with Royce and Phoenix, and is the guitarist in the Four Horsemen.

Jack regularly undertakes (and wins) Bar bets, and Tim states that Jack has never lost one. Jim suggests that this is because he is highly magical