Bakura

Bakura is friendly and cheerful person who is usually seen smiling. Her hobby is collecting others' pillows as she likes observing how people differ in their dreams and reality. Kazuya's pillow appears to have become a favorite of her's, as she states she spends a lot of time with him within the pillow and was heavily against destroying it. She has a habit of falling asleep abruptly, even in mid conversation or while walking.

(Source: Tsugumomo Wiki)