I think Merry's power will grow stronger until she can't control it anymore. Then, she will accidentally gap herself into the past of Gensokyo, leaving Renko behind. From there she will develop her powers until she becomes a youkai and eventually the old hag we know.
Did you just say "Hearn"?
Everybody has preferences, Anonymous.
maribel and renko are being lovely to each other!
Why would she throw away her prized inheritance?
No way! It's the best hat this side of the barrier.
I am sorry but that hat makes Renko look like a jerkweed dressed like a dickhead! Get a new hat!
See look how nice she looks!
first watch this:
then this (and the other four parts):
then these (in order):
the last three are seriously awesome
Your views must have been tainted! Renko's hat is a pure and honest hat historically worn by pure and honest preachers purely and honestly preaching about pure and honest things.
Therefore, logically, by removing it, you remove part of Renko's purity and honesty. Which is not good!
I feel bad now. Renko doesn't look like a jerkweed! She should keep the hat!
Renko having an intense logical battle with Yukari when? Please make it happen, ZUN.
Look at that Maribel! I would like to pat her head!
I think by that point she will have kind of becomes something else. Yukari and Maribel were the same person at one point, but not really anymore, so I'm pretty sure she would.
I want to see Yukari and Sumireko interact in canon.