Who is Rilakkuma?

Rilakkuma is a brown bear who mysteriously appeared in Kaoru's room one day. Rilakkuma is lazy everywhere and always stress free. With a taste for pancakes, dumplings, music and spending time in the Hot Springs. Rilakkuma is an example for all of us to relax and enjoy life stress-free. The most mysterious thing about Rilakkuma is the zipper on the back. Is Rilakkuma really a bear, teddy bear or plush? Or is there something else in it?

In Japanese, Rilak means -> relaxed and Kuma -> bear.