"You understand poetry, Arthur," an eyeroll. It's almost audible! At least it's in Nobunaga's tone! (Not that he realizes Arthur is blind... still.) "Ask him for a story about his childhood and what it's like to have the same birthday as 6 siblings and be taught martial arts by a monkey named Pogo, and have a mechanical mother, because your father couldn't be assed to do most things as a parent right, or even bother giving you proper names, just called you by numbers, according to your usefulness to him. If he gets fazed by the question? It's not Klaus. If he just sort of sighs and asks which of the times Reginald Hargreaves failed them as a father: either drugging one son so they couldn't use their powers, or locking Klaus in with ghosts, or why Five ran away before they could even properly named? Yeah, That's my lucky number 4."

A merry hum! "Four is a homonym with death in Japan. It's considered extremely unlucky, they won't even write it the same way, as shi instead they write it as yon. It's that feared. Follow his cadence. Go as extreme as possible. You can even ask him about torture. His torturers gave up on him, he's too hardcore for them. If it's not him, I think any ghost would also give up trying to mimic his reactions. As I said, they'd be overwhelmed."