So-hee Gwak

The younger daughter of General Gwak Seongjin. Kind and gentle by nature, she treats even the household slaves with genuine care. At times, she is more energetic and courageous than she might seem at first glance. She has developed feelings for Dol-swae and watches Yeo-reum and Dol-swae's budding romance with growing anxiety.

(Source: the manhwa's character introductions)