From one of my music lessons when I was younger. [ uta answers simply. ] An aria can be seen in the same way as a solo except for longer and larger pieces of music—like operas.

[ she'll briefly take a hold of one of gaku's hands when she finds herself wobbling too much. ]

Given that she's the Harvest Goddess and there's only one of her among all of us, it's like she's the single voice among the rest of the music.