Arata is a young man who just started his adult life, who became a public servant and was assigned to the Nocturnal Community Relations Division. He possessed the ability "Ears of Sand" which are said to have a great ability to master languages, and they can usually understand the words of Anothers who should not be able to understand. He had heard from his deceased grandfather that the Miyako Clan is from the bloodline of Abe no Seimei, but he never really cared about it. However, a statement from his grandfather suggests that Abe's bloodline is clearer on their side. He now lives with his parents in Kagurazaka after his grandfather died.

At the start of the series, Arata has been torn between the idea of understanding and helping Anothers and dealing with those Anothers who shows animosity. In the manga, he is shown to be quite direct in his words and got amicable with Torabo who comes to him with complaints.

Arata's name spreads to different wards and has been called occasionally when dealing with either a serious another or an another who is amicably to talk with.

Arata's idea of understanding Anothers sparks some serious concerns within their ward. Reiji himself wasn't keen on it, telling him that the work of the Nighttime Staffs isn't to help nor understand the Anothers but to end their business that could put humans in trouble. When dealing with Anothers, Kyoichi candidly told Arata who was feeling frustrated after a joint investigation with Satoru that if he were to be given a chance, he would kill Azazel who caused the disappearance of his sister.

(Source: Mayonaka no Occult Koumuin Wiki)