I pretty much agree with most everything you said about Viola (I can't really comment on anything DMC related) although I'll have to politely disagree on the gameplay segment because NGL you're the first person I've seen talk about accidentally charging her attacks which MIGHT be a button issue?
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Or alternatively press block which can actually offset combos crazy fast, which is a strength Viola at least has over Bayo
And Moon of Mahaa-Khala, which actually ends your combos when used