I recently watched the series Midnight Occult Civil Servants (Mayonaka no Okaruto) on Crunchyroll. The opening includes several seconds of a yellow-haired character who did not appear in the anime.
You can see sort of a ribbon of sand floating at his eye line. The main character, a reincarnated high spiritual power human with red hair, has a gift to understand and speak in Yokai languages, called Ears of Sand. My guess is the yellow- and red-haired guys are somehow related. My guess is that the yellow-haired dude is from further in the manga than the anime goes. Who is he?