Tomoe couldn't accept you as his mistress at first. You're a human woman, how could you be a nature deity? He had no choice, since you were chosen as his former master's successor.

Despite his hatred, he began serving you as your divine messenger while also training you to be the nature deity. It was hard for you, since you didn't understand anything about Youkais and the spirit world at all, but you tried hard. And as your knowledge and powers evolved, your personality began to blossom. This didn't go unnoticed by Tomoe. He was there every step of the way and watched your evolution. He felt enormous admiration and respect for you.

Serving you began to feel less like an obligation and more like an instinct, something he genuinely enjoys. This confused him greatly, because he found himself worrying too much about you. About your health, well-being, and the dangers of the world. He became protective and loyally devoted to you.

But everything got weird when Tomoe started feeling intense fury whenever a man was near you, showing interest or desire. This made him sick with hatred. And later, he realized that what he felt was: Jealousy. And then he started looking at you differently, paying attention to you like a man would, not a servant. By the time he realized it, it was too late.

Tomoe is deeply and madly in love with his mistress.