This location is in Shadow Hearts where the village near the castle has been plagued with monsters. And the villagers seem to believe that the monsters maybe connected to the castle.
Alice and Zhuzhen check out the place and find out the castle is the home of a vampire named Keith Valentine who has been asleep for hundreds of years, and has recently woken up due to the monsters entering his castle and a demon making its home inside his castle.
He then joins the two exorcists hoping to find something fun to do while he is awake.
Sometime later Keith's older brother Joachim awakens to bestow the family sword to Keith, after sensing that the world was in peril.
The Blue Castle never makes another appearance in subsequent games, but is mentioned, with Joachim stating he sold the furniture in the Blue Castle to pay off his numerous loans.
The Crypt is located on the lowest level of the castle. It houses eight sealed coffins and an open one, presumably Keith's. A corpse dressed in rags sits against the wall, and occasionally speaks to visitors/trespassers.
To unlock the door to the Great Chamber, pray at the coffins in alphabetical order:
|Golden Bat||After the Float is risen, with Keith in the active party, return to the crypt.|
- Thera Seed - The back wall behind Wanderer Meiyuan.
- Star Swallow - Behind the tree left of Meiyuan.
- Tent - Inside the castle, left of the entrance.
- Pocket Watch - Hidden in the lower left corner where the stairs lead to the crypt.
- Lottery Ticket - Follow the ledge from the open coffin in the crypt.
- Headgear - Chest in right cell, in the second level of the Tower.
- Cosmic Bracelet - Search left in the tree thicket.
- Pure Root - Search the cells in the Tower.
- Lottery Ticket - Left cell, in the second level of the Tower.
- Seal of Force - Right cell, in the third level of the Tower.
- Tent - Left cell, in the third level of the Tower.
- Dark Gravestone - At the Tower Summit where Yuri was sitting.