|Cause of Death||Unknown|
|Anime Debut||Episode 1|
|Voice Actor||Anastasia Munoz|
Azusa is a bright and calm woman. She loves her family very much. Azusa shares the same beliefs with her husband Yuuki, considering their unmarried status and moving to the village. She is also, just like her husband, ignorant of the vampires called Shikis.
However, she is also gentler than Yuuki, having greater compassion and sympathy, as shown when she allowed the shiki in simply because she thought it'd be rude to leave them outside. As a mother, she cares deeply for her son, Natsuno.
When she was turned into a shiki, she left her family if only to protect them.
She had her first child, Natsuno Koide, with Yuuki while they were in college. They questioned the value of marriage and never finalized anything on the family register. Their son has her surname for this reason.
She unknowingly invites Shikis into her household and later gets bitten. Eventually, she leaves her husband a note, saying she has left, causing him to break down (as Natsuno also dies at that time).
As it is common for people bitten by Shiki to leave notes saying they've moved away before dying, it could be implied that she too fell victim to them, or she may have actually moved away.
- In the second opening, Azusa was protrayed as a Shiki with Nao and Masao, even though she isn't actually depicted as one in the events of the anime.