Himi: a female Venus (Earth) Adept who possesses the power of prophecy that she inherited from her mother. She is a priestess of Yamatai.
Harumani: a male Mercury Adept and is a prince of the water kingdom Ayatayu. (I don't know, I'm just posting what they say, I don't remember any Ayatayu Kingdom >_>)
Stella: a female Jupiter Adept human beast race that has mutated since the Golden Sun Effect. Excelling in the 5 senses, she can read the minds of her company and sense unique smells, and is able to use visualized Psynergy.
Eoleo: another Mars Adept, resulting from an accident with a Psynergy Stone hitting his head when he was a baby. He is the son of Briggs and the prince and leader of Champa, now a pirate kingdom.
Rief: a male Mercury Adept and student of Kraden.
Tyrell is a Mars Adept. He is the son of Garet, Isaac's closest companion from the first two games.
Karis is a female Jupiter Adept and daughter of Ivan.
Matthew: the new protagonist players will take control of in Dark Dawn. Matthew is a Venus Adept like his father, Isaac, the protagonist from the first Golden Sun.