As soon as you enter Bernhard’s Wing on your way to retrieve your sword, you can find this body on the right of the hallway.
Just past the room where you cross the hanging chandeliers, go forward across the broken scaffolding. Go to the right to reach the stairs there. Before entering the next room, go to the left to find the body lying to the side.
Just after getting your first relic, when you enter the circular room with a double waterfall on the far side, go to the waterfall and in front of it, behind a pillar. will be the body.
Just outside the map room, you can find this body on the left side of the hallway.
From the entrance to the wing, where you first start, use the Chaos Bomb on the rope behind you to lower the platforms over the large gap. Hop over and go to the right where you will find a body there.
When you enter the circular room from the water filled tunnel, with a double waterfall, look to the side and there will be a tunnel with a gate over the entrance. Use the Demonic Wings to jump up to it and then float through with mist form.
Follow the passage to the left and then hop up through the opening in the ceiling there to find this body against the wall. You can also access the passage by jumping through the opening in the ceiling just before you enter the circular room as well.