Merlin is kind of a mixed bag. Her opener is pretty notorious due to the curvy lasers, but I know it's completely consistent if you've routed it properly (which I didn't do). It's still very spooky-looking either way. Her 2nd and 3rd nonspells are just simple streaming, like Lyrica's.
Merlin's solo spell is also unnerving to a lot of people, since it also features curvy lasers. It's once again completely consistent though, the lasers are static and you can end this spell very quickly especially with SakuyaB's damage.
At present, Ripper Roo has 253 views spread across 13 videos for Perfect Cherry Blossom, with the game making up 1 hour of published video on his channel. This is 2.39% of the total watchable video for Perfect Cherry Blossom on Ripper Roo's YouTube channel.