Eren kept acting like Zian was going to take of his mask and eat him, something that was a little bit endearing to the large elf. He slowed his movements a bit to not scare (or stress out) the kid even more, just carefully teaching out and taking his arm, gently examining it for a brief moment. Seemingly satisfied, Zian then reaches for some cotton and alcohol, cleaning the area of a nice vein.

If he could, he'd be humming, too.

"There we go. Now you'll just feel a slight prick for a moment, and it will be over. All I have to do then is fill the vials and you can get out of here. Maybe have some food, I heard it was pizza day in the cafeteria." Food was a good motivator for growing teens, right?