I sacrificed Araki first and now I'm at the stage where Marie has to find the Sopia core. The problem is, the walls which need Araki's special move keep blocking my path and I can't get past them because Araki's dead.
In that map, the way that is blocked off by the walls leads to a possible item location.
You don't need to go that way to get the sopia core. IIRC you need to head to the lower right corner of the map. --- http://altogether.insani.org -> Visual novel goodness Maaya Sakamoto and Younha are amazing~ <3 <3