佐伯 あすな

A schoolgirl working part-time at Kisaragi Shrine, and a friend of Yuma's. She's very chatty, so she'll often exchange gossip with Yuma, but has a tendency to occasionally say something without thinking and kill the conversation. Despite having a favorable relationship with the protagonist, they still somehow get caught up in numerous arguments since that's just the type of girl she is. Works together with Yomi in keeping an eye on Nayu, and helps to try and retrieve the Necronomicon from her. Additionally she is Saeki Yuugo's older fraternal twin sister. And on top of that she is also dead; thus her brother had been trying to bring her back to life.