A Blast from the Past

From: Isabelle
Description: I think that as soon as we’ve identified the stranger who attacked Martha and drugged Uroboros, everything will fall into place. The soul trap will help us. If the scoundrel used it, we’ll find the answer inside. Could you lend me some artifacts to open the trap?
Completed: I’m opening the trap... Look at how many spirits have been trapped inside! They’re taking on the shape of various birds... Their images disappeared and at the bottom of the trap the Bird Catcher’s pendant appeared! So that’s who it was!