Warriors: Ravenpaw and Firepaw
Firepaw is one of my favorite characters in Warriors, by Erin Hunter. Firepaw was a house cat the was originally named Rusty. Firepaw changes his name twice; Rusty to Firepaw and Firepaw to Fireheart. Firepaw's mentor is Bluestar.
Ravenpaw is another one of my favorite characters from Warriors. Ravenpaw is shy and jumpy. Ravenpaw is a black cat with a white tip on his tail. Tigerclaw is his mentor.
Ravenpaw actually reminds me of a character off of a book that I have read.