Kikuri

An enigmatic little girl introduced in season two, episode 4 and then starts to reappear in season two. Little is known about her except the fact she is not an ordinary human as she can wander freely between the mortal plane and Ai's house in the sunset world, sometimes interfering with her and her companions' job. Her appearance is often accompanied by a lullaby-like background music. In stark contrast to Ai, Kikuri has completely blue/purple eyes (including most of the sclera) and her personality is far more childish (yet much livelier as she has the tendency to pull pranks) than Ai's.