Before rebirth: She was a vicious female partner in the minds of others. For her own selfish desires, she made it difficult for the male protagonist and the female protagonist to fall in love. She was also a pitiful person. She worked hard but ended up dead in a foreign land. It was only after her death that she found the person who loved her loyally.
He is the loyal dog behind the vicious female partner. He is willing to give up all his wealth and even his life just for her to make a joke, just so that she can be happy.
After rebirth: She was determined to spend her whole life loving the lovely loyal dog beside her, and she overbearingly made him promise that he could only love her in this life!