"Found inside the Last Book Vol.2. Is there a special way to use it?"
The Medal of Wolf, or Wolf Medal, is an item in Resident Evil.
The player must place it in the hollow slot on the west side of the Courtyard Fountain. Placing both medals will open the entrance to the lab.
The medal is found inside the Last Book Vol. 2, located in a secret room in the tunnels beneath the Courtyard. Examining the side of the book will open it, revealing the medal.