Uchida Maaya (Rikka) has just been announced as the voice of Spica, a new character in the Japanese version of the online game
Pangya. You can link to voice samples from
this page. Click the banner on the character herself, then click the two "voice sample" buttons.
Mayayan has clearly picked up something from acting with Uesaka Sumire in
Chuunibyou: there are definite similarities between Spica's voice and Dekomori's.
I think Mayayan is a pretty good voice actress, but her physical appearance does have something to do with her rising popularity: