
Quick answer — fripSide worked on Seraph of the End: Battle in Nagoya (Theme Song Performance), Hayate the Combat Butler: Heaven is a Place on Earth (Theme Song Performance), Koihime†Musou (Theme Song Performance) and 3 more anime.
fripSide worked on Seraph of the End: Battle in Nagoya (Theme Song Performance), Hayate the Combat Butler: Heaven is a Place on Earth (Theme Song Performance), Koihime†Musou (Theme Song Performance), Schwarzes Marken (Theme Song Performance), The Dawn of the Witch (Theme Song Performance), Dances with the Dragons (Theme Song Performance).