Yes! I did speak to Arya person, and we don't think Arya would easily give up any information to someone she doesn't really know, but yes. Derek! Nina!

I think Nina's always been keeping her eyes on the blood supply! It's really her only way of keeping check on the DONATIONS/how much is being eaten. We can definitely ask on that.. if it would be possible for her to notice/if she has access to that area/wherever in the medbay blood lives.

Yeah we don't want anything TOO obvious/direct just side-eye material. >D We can poke Mici, right? See if Annie would keep completely tight lipped about Mitchell and his blood eating. I think knowing he's back on the blood for any reason would make her super sus about vanishing blood.