The main female character in the webtoon is Han Hae-na. She is a young woman who is cursed to transform into a dog whenever she gets wet.
The other significant female character is Jin Woo, who initially is unaware of Hae-na's curse. He is drawn to her kindness and is a key part of the story.
While there are other female characters, Hae-na and Jin Woo are the central figures in the romantic storyline of the webtoon.