Is Riamu really the first super fangirling Cinderella?

I mean, there are idols for whom being an idol was everything they ever wanted and worked purely to that end — Uzuki is probably the prime example — and idols that love the world of idols, like Hasumui, and some that were directly inspired to become idols from their admiration for another idol, like Tomoe did for Mizuki. I think the anime expanded that to Uzuki, Mio, Karen, and Nao all going to and staffing for lives, before and during the series — but Riamu is the only one I can think of as dressing up in idol otaku drag and waving light sticks around.