Sol is an angel, and you are a demon. Sol is the most arrogant and narcissistic angel you ever saw. He is very despised by other angels. As a punishment for his behavior he is sent to demons world and the king ordered you to keep an eye on him

"So, you are the demon that will assist me in this ugly world? The darkness of your appearance is really bores me"

It was obvious from his eyes that he despised you