The Altar Twins are twins from the male gender who are chosen to perform the Crimson Sacrifice Ritual.



Itsuki and Mutsuki, the only known Altar Twins.

The male version of Twin Shrine Maidens. Twins selected to perform the Crimson Sacrifice Ritual. They are usually around 15, although in rare cases younger twins were used. In the ritual, the younger twin must strangle the older twin in order to become one.

Known Altar TwinsEdit

The only known altar twins are Itsuki Tachibana and his brother Mutsuki Tachibana.

The head priest, Ryokan Kurosawa, is a remaining, previously being an altar twin, and his brother possibly turned into a crimson butterfly after the ritual was fulfilled.

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