Girls Dead Monster (abbreviated to ガルデモ, Gldemo) is a fictional all-girl band from Jun Maeda’s anime series “Angel Beats!”.
In 2010, an album was released under the Gldemo name featuring original songs from the anime. The real life band was
comprised of singers LiSA and Marina, with arrangement and instruments by famed guitarist & vocaloid/anime/doujin music
producer 光収容 (Hikarisyuyo).