Oyasui Motomi

She is a girl who loves water itself as a substance, seeks out places by the water, and often tries to get the people around her to join her by the water.
She is perfectly at home in the water: she can swim, dive to great depths, and somehow stay underwater for a very long time.
She does not mind getting wet or being caught in the rain, and she can seemingly make water appear out of nowhere.
Rumor has it that she can produce not only water but also ice and snow. However, she does not like wind. The cold does not bother her at all, but she does not do well in hot weather.

She is often described as having a calm presence, and people say she is not very scary even when she gets angry.
On the other hand, she sometimes shows a mysterious obsessive side or surprisingly intense emotions.
People often see her as the science-oriented type, and her clothes feature several science-inspired designs.

Height: 161 cm
Age: Said to be 18 years old (or perhaps the molecular weight of water)
Birthday: July 1 (the same date as Lake Biwa Day)
Hometown: “A city by the water,” though apparently not one in Shiga Prefecture