[Tom Bombadil]

Originally Posted by SageGaiGar

Well, that also raises the question.

Spoiler for Hakko:

Does she also need the pills and if so I'd guess that guy supplies them.

Spoiler for my guess:

Which guy? Blond one or her lover(the shopkeeper)?

This remind me that in the episode, the shopkeeper said" that woman" without referencing to a particular one. Text-book way of keep the viewers guessing.

My guess is on Hako, though you can't actually rule out others.
She does acts on her own. There is a very high chance that the mail in the last scene is from Hako.(Couldn't she just text message to him?)
Oh, they also raised the possibility that Hako can actually speak.