I've gotten M6 in roulette a few times now and it feels like the theming doesn't land at all. Her early attacks have this over-cartoonish effect but the resulting objects are dull; the landscapes she paints don't match that style and then what actually manifests on the arena is just landscape assets grabbed from elsewhere. It doesn't feel themed to the character at all.

(M5 on the other hand is great fun and sticks to its vibe the whole time, which makes M6 feel worse by comparison.)