Illustrator. Author and illustrator of Ukare Bakemono no Hogaraka na Hatan and the artist for the 66 (Roro) version of Nenchaku Kei Danshi no 15 Nen Nechinechi. The elder sister of Manbou, the man who made the song.

Goes by Tsukasa Ryugu after the pair's professional debut.

Official Site: http://death-manbo.com/