Rantz is an ogre who lives in the east of Feldip Hills. He is located at the only quest start icon in the eastern part of Feldip hills. He is a non-aggressive NPC used in quests such as Big Chompy Bird Hunting, One Small Favour and Recipe for Disaster.
Rantz will give you the ogre bow during the Big Chompy Bird Hunting quest and afterwards if you lose it, he will sell you another.
Rantz is also used in various clues for treasure trails.