When the series was announced, Rina was the character I was most excited for because she seemed different. I loved the idea of a character who barely communicates and hides her face behind a mask. I also loved how her mask gave expressions so that you could tell how Rina was feeling. Her wearing a mask and barely talking made her stand out the most out of all the new characters.
But then the anime started airing and it feels like they've completely gotne against what made Rina so unique. She rarely wears her mask and she talks way too much. Sure, she's shy and timid, which is her character, but I always felt the whole appeal of her was her design and the fact she wore a mask because she was shy to show her face. But now, they completely did away with it.
I really feel the anime has done a disservice to Rina in regards to what she could be. She could easily be the most interesting character of the whole cast, what with her hiding her face and her barely talking. But now, she barely stands out. I like the anime as a whole, but I hate how the anime has presented Rina.