emberblazeofwindclan guessed the last cat correctly. It's seems like she wins every other time, so I have declared a new rule: a person may only guess two times per riddle. So be careful about what you type. Anyways, here's the next riddle:

I walked with the darkness
I walked with the light
The light, she was the only one
Who saw me nice
Her sister despised me
I would be the Clan's doom
For blood was upon me
And on the rest too

Good luck!
~Night