Leaving behind nothing more than a note, Mana suddenly disappears. 
Ren and the crew try to piece together where she could have gone, 
eventually going to speak to the heavily-injured Walpurgis. 
When Walpurgis tells them Mana's secret and her plan to sacrifice herself, 
Ren and crew rush to save her.
So the "unleasher of the red moon" 
that Miroku talked about was Mana.
Der Erlöser des Rotmondes
von dem Miroku sprach,
Así que Miroku se refería a Mana
con lo de la liberadora de la Luna Roja.
Así que Miroku se refería a Mana
con lo de la liberadora de la Luna Roja.
La libératrice de la lune rouge
dont Miroku parlait
Quindi la liberatrice della Luna Rossa di cui
parlava Miroku è Mana.
Então a "libertadora da lua vermelha"
 de quem a Miroku falava era a Mana.