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 wascomprised of singers
LiSA and Marina, with arrangement and instruments by famed guitarist & vocaloid/anime/doujin musicproducer 光収容 (Hikarisyuyo).