I was playing the japanese version for a little bit before I got too confused and got tired of lagging. :| I didn't feel like changing my language for the game.
I got up to a level 17 eagle archer.
They got alternate colors, so I went for a bald eagle.
It seems like in the beginning it's really quick to level up, you start with animal only, then at level five you can turn into human and use all your neat equipment. I got a frog pet and a feather board from one of the quests I did.
Not that powerful, but it helps. The board is kinda useless though, you don't go any faster.