Yui Gekikawa

She's the parallel version of Yui Yumekawa from Idol Time PriPara. Much like the original Yui's personality, she is super optimistic, hard-working, and energetic. She still retains using "yume" in her sentences but says "super cute" (Gekikawa) instead of "dreamy-cute" (Yumekawa) as one of her catchphrases. Yui and Maria are relatives.

(Source: PriChan Wiki)