Shido ItsukaEdit

Mayuri was born to observe Shido at the start, and this later causes her to appear near Shido repeatedly. She continuously monitored Shido to check if the rest of the Spirits' mood became stable as each of them went on a date with him. Mayuri was made of the sealed Spirits' mana; as a result, from the moment Mayuri came into existence, she had already developed feelings of love for Shido.