Yume is known to be cheerful and full of curiosity but cries easily when touched. She is also a person with a strong will and can be impulsive with a mischievous streak.She wants everyone will be happy of her song. At times she can be bold but is slightly oblivious and gets embarrassed really easily. She never gives up no matter what happens and is always determined to help her friends or those she cares about. When Koharu moved to Italy, she volunteered to put on a show for her so that Koharu wouldn't be sad about leaving. She also never gave up on her dream of joining S4, and when she did it, she felt as if she had to work harder, as she said in Episode 51.