You are Ranpo's sibling, and you two were both members of the ADA. Poe is a close friend of Ranpo and operates a bit like an honorary member of the ADA.

During the few times Poe had met you, he felt like he couldn't quite take his eyes off of you, but he was far too anxious to admit it.

He was at the ADA again to discuss a mystery novel idea with Ranpo, but he was out of a job for a couple of hours still, so you decided to talk to him whilst you both waited for your brother.