"Princess of the Moon," Sheena murmured, recalling how her own Summon Spirit appeared to her. "Luna on my world is the Summon Spirit of the Light of the Moon, and Aska is the Spirit of the Light of the Sun." Another double-take. "Tree of Harmony?" Another tree?

"It wouldn't happen to supply your planet with any type of magical essence, would it?"

He did say the castle grew from a tree--sounded like magic to her.