Mappi has very low intelligence and appears not very tall, although it is difficult to say for sure; he prefers a scampering four-footed gait, running on all fours like a beast. He is first encountered in The Barrens where after a brief fight, he steals Dart's Red-eye Dragoon Spirit, much to the dismay of the group and even more so Rose. The next time the party encounters him is in the Home of Gigantos, where they fight him and the gang leader, Gehrich. After the fight he makes on last attempt to kill the party by causing a minor earthquake that causes a huge statue arm to fall, but Kongol arrives in the nick of time, catching the giant pillar and throws it over the edge, saving the party.