LNN I decided to go for like a month ago although it had been part of my plans since I got the one with Reimu A.
Marisa A felt strong overall, slightly worse than Reimu A maybe. She has an easier time on stage portions and on Rin's first and last spells notably. She's not much behind otherwise and her Satori fight isn't very hard and most of all an easier time if you timeout s5 midboss to avoid two patterns that are troublesome (especially the spell) and have a not too bad stage part instead.
The main thing that felt hard compared to Reimu A was Rin's third spell, where she takes around 5 more seconds to kill it and the bigger hitbox felt very noticeable here.
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