Same intel we have in demon's souls!

The knight of boletaria ostrava in golden armor is lucifer and when you first meet him is trapped, every time you meet him is trapped and you help him get free.

In the end he gives you a key to access a room where you find his father imprisoned there!

He had his father imprisoned the entire time and was acting like he was looking and searching for him the entire time.

At the end he shows also his true colors and tries to kill you.