Michelle "Luna" Smith is an American who has moved to Japan for educational purposes and is living with the Yagamis. Luna moved to Japan two months after Kira arrived, but it was already arranged by the time Kira appeared. Luna is sharing Sayu's room and she's funny, nice, respectful, caring, calm, thoughtful, and very firm beliefs like Kira. And once Light realizes Luna is a good person and trustworthy he starts to fall for her. But, he's already "dating" MisaMisa and the Kira killings stopped for a while. L suspects Luna and Misa are helping Kira. Luna knows who Kira is and she loves him and keeps his secret. What will Kira do with Luna?