That is not Peter Pan. He’s Malcolm, and original character masquerading and double casting as Pan, just like S7 Hansel double casted Jack, S4 Ursula double casted as s3 Ursula, and Gideon masquerading as Morpheus. But believe me, if the real heroic Peter Pan shows up in a potential revival (as hinted at the possibility in Ask Me Anything Board), then I would choose him as a favorite too.
Anyway, I choose Red, despite her not being in the list. Also because she was a main character and I love her relationship with Snow, especially with Charming by reasoning with him a lot. I also choose Granny, Aurora and Mulan too. For one thing because of their relationship with Snow and that she has a lot in common with them as she did with Red.