Portraits revealed through your current reading position.
The trap-master crow who stayed hidden on the ninth floor to spring the one small trap that broke the Nothing.
When Juice Box leapt into The Nothing, Justice Light told her he was going with her. He lied. He needed to remain on this side of the veil to arm his last device, so he hid his presence with a spell while Emberus set the whole of Larracos and the rest of The Ninth Floor on fire. Porthus knew the plan; The Apothecary knew a challenge was coming but not how much worse everything was about to get. He took quiet solace in the fact that most former crawlers had already taken their deals and were on their way back to orbit.
He looked one last time over the elaborate system of traps he had built and never needed, then turned to a single tiny one. With a talon he snapped a piece of twine, and a legendary trap toppled, dropping the Bijou Trap and the Demon Trap into the permanent portal into the Nothing made from the broken, blood-soaked The Winding Box. He signed off with a last message — "I am not sorry. Peace to you all, brothers and sisters" — and as the fire took him he cawed into the air, never seeing the system messages that followed. He died imagining four planes folding together, the bijou threads tightening into a flower pattern, and the darkness at the center breaking apart.
A crow-like bird whose feathers and talons are the last thing visible as Emberus's fire engulfs him in the burning ruin of Larracos.
The architect of the Nothing-breaking trap, who sacrifices himself on the ninth floor to change the course of the war.
Also appears in books you've already read — spoiler-safe to their endings: