Something that occurred to me about the flowers and Ch5's final battle

Throughout the fight, Flowery calls on the other six flowers in pairs to aid him. And if you think about it, just like how Flowery himself is a parallel to Ralsei, each pair's members are parallels to Kris and Susie in some way as well.

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Seth: Just like Susie, they're also totally inseparable from Aqua, and have fears and anxiety regarding being accepted by those around them. They're also the exact same shade of purple as Susie, or at least close to it.

Aqua: Just like Kris, they're a light-blue knife lover. Not only that, Aqua's a child who loves violence, and Kris is implied to have had violent tendencies when they were a child just like Aqua does.

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Orange: Just like Susie, they're a fierce and aggressive tomboy who bravely fights to defend the people they care about, but doesn't really know how to do it very well on their own.

Green: Just like Kris, they're almost if not entirely mute. They also aren't a particularly powerful fighter on their own but can empower Orange to make her a serious powerhouse, just like how Kris can't use magic but can empower Susie's ACTs.

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Yellow: Just like Susie, he's kind of an idiot, but he's an idiot with a big heart and a strong sense of justice, who won't ever tolerate evil but is never willing to hurt someone he cares about.

Blue: Just like Kris, he's someone who's allied with both sides of the conflict he's a part of, allying himself with both the heroes and Flowery like how Kris allies themselves with both the heroes and the Knight. But despite their conflicting allegiances, it's also clear that they both genuinely care about the people around them and don't want to see anyone get hurt.

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...And now that I think about it, even though she doesn't appear in the Flowery fight, this even applies to Pink, too.

Pink's Body: Just like Kris, she's a body with its own thoughts and feelings and desires, inhabited and controlled by a disembodied being from a higher plane of reality that also has their own thoughts and feelings and desires, and is in conflict with that being despite the fact they literally can't survive without it.

Pink's Ghost: Just like Susie, she's a Lightner who lived an almost (if not entirely) isolated life with virtually no one they cared for or who cared for them, until they accidentally wound up in a Dark World, which allowed them to make friends, find love, and finally be able to live a happy life for the first time.