There is a returning characters. But there are just not a same name.
Vahneem Vast - the spirit of Vahn who never know the past of Vahn.
Maya - the face look like Princess Rhythms. She is the chosen one to be brought in Prism Land.
Yuriken - the spirit of Gala. Master of Legaia Arts. Owner of Legaia Moanstery
Cleyra Vast - the lost sister of Vahneem. Her journey is unknown to be told.