[1][2] Their works include the opening tracks of several anime series, including Future Diary, Magical Pokan, Innocent Venus, Kurokami: The Animation, The Qwaser of Stigmata, Big Order, and the Tokyo ESP soundtrack.

Yousei Teikoku is led by vocalist Yui, whose official title is "Dictator for Life".

[3] She bestows honorary titles on the band members as part of the Fairy Empire.

[clarification needed] Prior to 2009, Yui and Tachibana were the group's only official members.

[5] Guitarist ryöga was announced as his on stage replacement, joining the band at the rank of corporal.