Persona 3 Request 14
For this Request you will need to find a Treasure Hand in the second block Arqa. These are the rare shadows on the second block and you'll only need to kill one for a Steel Medal. They'll run from you when you get in their line of sight so you'll want to sneak up on them and whack them.
You will also need to try and dispose of them quickly in battle (One shot is all it will usually take) as they'll run from you first chance they get. If you are playing on an emulator a piece of good advice is to use save states when a rare shadow gets in your line of sight.