Finally getting to see Shura's backstory animated was a real delight, as it included a bit of Japanese Mythology with Hydras and Great Snakes. Also seeing her again is a real delight. The Innkeeper hinting at Rin and Yukio being together was nice comedic touch. But is she human or spirit ??? Guess we'll see~ But honestly the writing for Shura's arc felt more like an NPC sidequest in an RPG, as there is strong hints that the brothers will help her find her way out of her predicament.