Buster-kun
Buster-kun, or Little Buster, is a term used to describe a fan of Japanese rock band the pillows. In 1997 the band visited England; where vocalist/guitarist Sawao Yamanaka found this weird dog-looking toy in the window. (It appears in the video for "Hybrid Rainbow" and the CD booklet for "Little Busters".) He took that doll; and made it the universal symbol for both the band and for the fans.
My friend is such a Buster-kun; so I got her the band's latest CD.