A ykai who is Sesshmarus servant: not especially powerful but extremely loyal he is usually a comical character. Sesshmaru typically responds to Jakens failures or more annoying behavior with a sound beating but Jaken believes this is Sesshomarus right and never wavers in his loyalty. Jaken started following him in the first place after being captivated by his power and majesty when he slayed a threatening demon saving Jakens life this was incidental Sesshomaru killed the demon simply because it was in his way. Note: these events were related ONLY in the anime. Jaken means meanness or unkindness.