Re: Magic Castle RePure Aria Paradise
I've found that they unlock some door shortcuts, in certain points in the game. Nothing major (you can go around the ones I've found) but convenient to move around. I've not completed the game, though, so I can't say if more show up later.
As for the other question, not really. I've seen some things which will empty your mana and turn you into the boy, but none that keep your mana as the boy. You'll need to pick up those red heart-things and fill up the yellow orbs at the top in order to transform back instantly.
One yellow orb per transformation.
Can't transform when there is an electric pulse running through them. (The electric pulse will also empty your MP.)
I've found that they unlock some door shortcuts, in certain points in the game. Nothing major (you can go around the ones I've found) but convenient to move around. I've not completed the game, though, so I can't say if more show up later.
As for the other question, not really. I've seen some things which will empty your mana and turn you into the boy, but none that keep your mana as the boy. You'll need to pick up those red heart-things and fill up the yellow orbs at the top in order to transform back instantly.
One yellow orb per transformation.
Can't transform when there is an electric pulse running through them. (The electric pulse will also empty your MP.)