I looked at Leon carefully and said "I believe...that the soul is something that makes you, you. If you didn't have it, it would just be an empty shell."
Leon sighed, obviously not impressed by my answer. "No." he said, "I don't want the definition. I want what YOU think it is."
I hid my face. "I think the soul is something that makes yourself," i repeated, "But its yourself that makes your soul...it..." i stopped my sentence.
Leon smiled. "Finish that sentence, will you-, huh? Oh. Xeo-i mean...Moonsong, have you heard the latest news? My dear brother Spati has joined the team."
I bolted upright. "What!?!" And there in the doorway stood Spati. My friend, the only person i could truly trust when I got into the Otherworlds. And there he was, in the doorway of the enemy. I believe i now know what the soul is. A place where you feeling form and gather. It makes you whole...

...but it can also break into a million pieces in just a single moment...