Katara

If you have watch the " avatar The least Air bender you will know who she is a 14 year old girl the Master water bender and one of the couple blood Bender's in the world. You can be: Aang(avatar, 12 Year's old, Aang is Katara student) Sokka(her brother, 15 years old, the master of swords) Toph( a 12 year old blind,earth master) Zuko( 16 Year old, fire Bender)