There has never been a character that has touched my heart more than Rina. She is not like your typical sweet, cute, shy idol. She struggles to put up the cute idol image she wants. She struggles to connect with her idol peers and her fans. She struggles to express her emotions inside. But, these are what make her human. It inspires me to see Rina take what gets her down - her difficulty in emotional expression - and change it into her greatest feature with the iconic Rina-chan Boodo.
But even without her board, she had already connected with me. The difficulties she shared with being emotionally vulnerable, not having many friends, but still wanting these things resonated with me. I became invested in her self-growth and it makes me happy to see how she has changed throughout the series so much for the better.
Rina will always be the sweetest, the cutest, the best idol to me because I know she has been able to accomplish everything she wanted: to smile and connect with her friends.