Kirara is Sango's pet/friend.  She looks like a fire cat demon.  Kirara has two forms.  Her normal form is a cute little two tails cat-like demon.  She can transform into a bigger and more powerful form, kinda looks like a saber-tooth tiger with two long fangs pointed down.  She can fly in this form and has fire around her legs and tails.  Often can be seen with Sango riding her.  One thing about Kirara is that she can't talk.