Jeeg (ジーク, Jiku) or Sieg is a mysterious giant ant that works for Genzo. His motivations are unknown.
Jeeg is an enormous brown ant with big red eyes. He is sometimes seen naked or wearing a pink apron when he is working. He appears to have a scar over his left eye.
Jeeg appears to be a highly mysterious and silent individual. He is never seen talking which means it is unknown if he can speak or not. Despite all of that, Jeeg is very hard-working, he does most of the housework at Kemono Michi. In addition, Jeeg is supportive, useful, loyal as he has always been there helping Genzo since the very first day he came to the new world.
- Enhanced Strength: Jeeg is a very powerful being. He defeated Wolfgang effortlessly. He also pushed several of Joanna's minions off of him when they tried to restrain him.
- Enhanced Stamina: He is always working and never takes a break.
- Jeeg has talents in drawing picture.