Coming from a family of Traditional Ultimates, Yu has always had a huge name to live up to. Since she was little she was interested in following her family legacy, and her parents were incredibly supportive in her goal. While she was very well known because of her family’s history of being Japan’s Ultimate Marine Biologists, she shied away from large groups of people as to not draw attention to herself, and she never boasted about her family’s status. When she became of age, she had successfully inherited her family’s title, and became the current Ultimate Marine Biologist after she got a formal invitation to the Ultimate Banquet from Japan’s government. Will she be able to fully live up to her family’s history despite the despair she will soon face?

This is a supporting role.

Yu is very quiet and shy. She speaks very calmly with a slight stutter in her words, but she's very intelligent despite sometimes struggling to get a word in edge-wise.