A musical group made up of:

Seiya (composer, producer)

.H/de (lyrics, video)

quad (sound engineer)

fooca (vocals, 2006-present)

risuko (vocals, 2008-present)

Misuzu Umino (海野みすず; lyrics, video)

Past members:

Hiroki (composer, arranger, lyrics, 2000–2006)

nomico (vocals, 2004–2006)