Special picking tools

Exploration Stage: Foggy Backstreet
From: Carlos Light
Description: I feel as if I know something demanding about Violet. That's why I really want to recover my memories about her. I am even willing to sneak into a pawnbroker's warehouse to do so. It may not be easy, but I have a special picking tool. But where did she go....will you help me find the liquid key with me?
Completed: Thank you for your help. Without your help, it would have taken me much longer to find it. It is made of a special flexible material that can be transformed into any shape and then frozen in that shape for a while. It would then open the door. This is super-secret technology, so please keep it to yourself...