Manbou no Ane (マンボウの姉) is an illustrator who won in the VOCALOID Festa (VocaFes) contest for fan visualization of VY2 along with Rimiko, who won for VY1's. She also illustrated the boxart for VY1v3.
As the name suggest, she is Ie no Ura de Manbou ga ShinderuP's older sister. Her first work appearance in Niconico is an illustration for the song "A Sunfish is Dead at the Back of my House," and eventually, she created fully-illustrated PVs for her brother's original songs. She also provides PVs for utaites such as Sekihan and Soraru and actively contributes in official VOCALOID artbooks and CD cover illustrations.
She now uses Tsukasa Ryugu (竜宮ツカサ) as her artist name since the release of the major debut album "My Colorful Confuse" of Ie no Ura de Manbou ga ShinderuP (who also renamed himself, as Takahashi You).
Manbou no Ane's character for VY2, 66 (Roro), became very well-known in the fandom due to the popularity of her PVs which featured him. Her most famous work is "Kuwagata ni Chop Shitara Timeslip Shita" (Time-Warped After Chopping My Stag Beetle) featuring GUMI which currently has over a million views.