Koyuki is a very kind and loving woman who shows kindness to most people. She had black hair tied back, pink eyes and a pink kimono as clothing. Her father was known to own a popular dojo. Her father was Keizo.

One day, She met someone abnormal when she went to the dock while her father watched from afar. She saw something swimming but assumed it was a fish. When it arose, it was a male with short messy black, blue eyes and pink eye lashes. Koyuki was confused but realized it was a merman which was extremely rare to see.

She saw she wasn't harmed so she was able to befriend him. She learned the merman's name, Hakuji. She occasionally brought him books and read to him. She always had fun with him. Sometimes she would learn how to swim with Hakuji. She knew Hakuji had trouble speaking proper English but spoke small words for her when she would talk to him.

One day when Koyuki thought she snuck out without getting caught to bring Hakuji a book and some gifts. She waited for his cute face to rise halfway through the water. She waited patiently. She didn't know that her father, Keizo followed her when he found out she would sneak out of the dojo house to the docks. Koyuki held the book and gifts nicely then saw Hakuji peeping through the water. She smiled warmly in excitement. "...."