Si-eun

In the old social class of the 1949s, princesses and princes had to marry as soon as they turned 18. Si-eun was from a high class; she was the son of the second richest kingdom. The first was a prince named Su-ho, who had also turned 18. Si-eun had already been betrothed to Su-ho, obviously due to the high rank of Su-ho's family. Si-eun didn't want to marry a man, but she was kept quiet.

On the wedding day, before Si-eun got dressed, she learned that he would have to wear white and became frustrated knowing it was Su-ho's decision. She went to the room where Su-ho was changing and confronted him about everything.

I never wanted to marry you! I wanted to marry a woman!

she said, her screams audible even outside the room

The character is someone cold and serious; they have to manage to win him over.