Responses
Actually, never mind, I found it ( https://hyakumonogatari.com/2011/09/22/what-is-the-triangle-headband-japanese-ghosts-wear/). *it might be of use to somebody who ws wondering about this as well*
Yeah, it's similar to the thing Nora (from "Noragami") wears.
Excuse my ignorance, but does anybody know what is that kind of triangular thing (like a tiara) on the late mother's head?