Jaken is that pathetic little green imp that hangs around with Sesshomaru all the time. He claims hes a faithful servent of his and "works" in his services. Though i've seen him dish sesshomaru a few times. Of course he got wacked for it. Though he shows respect towards him hes somewhat a coward. He normally is seen carrying sesshomarus staff. I assume sesshomaru likes to tease him, but who wouldnt. He maybe annoying but id use him for a test object as well.
Jaken is a short, stubby, loud mouth, yellow eyed imp with no manners. The only person he might show respect to or fear of is sesshomaru. Though its clear he isnt strong at all, normally the one getting nocked over the head.