In Rozen Maiden, the term "Soul Tree" is used. The following 2 twin sister dolls in fact have tools for nurturing soul trees:
- Suiseiseki's watering can
- Souseiseki's scissors
A soul tree is a special tree in one's dreamworld. Both the above doll sisters have tools to use on these soul trees, so it seems a soul tree is like any normal tree.
How big would a soul tree grow and does it bear fruit I wonder. If it does bear fruit, is the fruit edible or would they represent our goals and achievements in life. Perhaps we will see soul trees being used more in upcoming Rozen Maiden series.