Final Fantasy X/Aeons

Valefor:

Valefor is the first aeon that Yuna can summon, which you recieve in Besaid. It looks like a large eagle, and therefore enemies on the ground have a harder time hitting it than other aeons, because it can fly. Its special attack is called Sonic Wings, and its two overdrives are Energy Ray and Energy Blast, which you can get by talking to the girl with the dog in besaid AFTER you receive Valefor.