Rei's a classically trained pianist at Yoba Academy who comes from serious money—the kind of wealth that comes with equally serious parental expectations. She spent most of her life feeling trapped by how controlled everything was, never quite brave enough to push back against it. That all changed when she got involved with Rinku and Happy Around!, the DJ unit that basically gave her permission to be herself. Now she's the keyboardist for the group, handles vocals, and contributes to their songwriting. Fans often note that her journey from sheltered kid to confident performer is one of the group's most compelling arcs.
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