Oh my wow, it’s like you’re inside the characters’ heads with how spot-on your analysis is XDD I’m honestly blown away! I’m trying to hold back from saying too much so I don’t spoil anything, but I have to answer the last part.
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Just imagine it, what does Rosario have that Merka doesn’t? Something that could make the Hero of Envy rely on someone else. It’s actually something Sev picks up on during their conversation too~~