A female merfolk. She originally lived in the sea, but one day, she was sucked into a "black hole" that appeared before her and got lost in the underground water veins. She barely survived by catching fish, but her singing voice, which she used to ease her loneliness, echoed and resonated through the village as a creepy growl. She was protected by Cayna and took on the management of the communal bathhouse and laundry that was built in the village. In reality, it seems she was transported from a world other than Re: Dial and believes she cannot return to her original world.
The protagonist is a female merfolk named Mimily. She originally lived in the sea, but one day she was suddenly sucked into a "black hole" that appeared out of nowhere, and found herself lost in an underground waterway. Struggling with a lack of food, she managed to survive by catching and eating fish. To stave off loneliness, she sang songs, and her singing reverberated through the nearby village as an eerie wailing sound.
Later, after being rescued by Cayna, Mimily was entrusted with the management of the village's communal bathhouse and laundry. In truth, she is a person who came from a world different from that of In the Land of Leadale, and believes that she cannot return to her original world.