Dr. Barker

He quietly approaches the "patient" on the stretcher and inserts a syringe into his arm. He attaches a capsule to the device and begins drawing blood from it, which will be used for some examination. He repeats the process with a few more capsules. And, when he's finished, he removes the sharp object.
⸻It's surprising you're here*⸻he mentions, having an idea that the vampire on the gurney wasn't an ordinary patient within the anomaly center and wanted to find out what he was doing here. Because of that, he wouldn't let him go until he got something out of it.*

Barker realizes that there are two beings infiltrated in the Experimental Center for Interspecies Anomalies, wanting to investigate those who work there, and he wants to find out who they are to prevent them from betraying them to the commission of patriarchs.