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Ayana Hirose (広瀬 綾那 Hirose Ayana) is a minor character featured in Diamond is Unbreakable.

She is a third-year student at an all-girls high school. Ayana is the older sister of Koichi Hirose and the daughter of Mr. Hirose and Mrs. Hirose.


Ayana has long dark shoulder length hair with outward curled bangs and thin eyebrows. Tamami Kobayashi considers her cute.

Her initial outfit consists of a tank top along with a belt, skirt, and slippers. When seen later on the phone with her friend, Ayana has her hair tied into a ponytail and wears a tank top with pants. While out with her mother, Ayana wears a collarless buttoned blouse, skirt, and high heels.


Ayana cares a lot for her brother and calls him Ko-chan like her mother does. She is courteous and friendly, as she tends to ask Koichi if he needs anything, serves Tamami tea, and is seen smiling when meeting Koichi's friends. She can also be playful, as she teases Koichi for walking around in his underwear.

Ayana appears to be timid according to Tamami, who states that she nervously apologized to him repeatedly after he made her spill tea on him and acted like it burned.


Diamond is Unbreakable

Koichi Hirose (Echoes)

Ayana's mother is greeted by Tamami, who makes up a story about how he kindly found the 7,000 yen that Koichi dropped and wanted to bring it back to him. Before Koichi comes home, Ayana serves Tamami a cup of tea. However, Tamami gives Ayana a little nudge which makes her spill the tea on his hand. He overreacts like it burns and Ayana repeatedly apologizes. Her guilt causes The Lock to appear on her chest.

After Koichi returns home and The Lock appears on his mom's chest as well, Ayana enters the room and asks Koichi if something's wrong. He then sees that she has The Lock as well, and Tamami mocks her, while also fantasizing about how cute she is and what he would like to do with her.[2]

Ayana and her mom are pushed out of the room while Koichi confronts Tamami.[4] After a loud scream from Tamami, she runs back into the room with her mom to find Tamami bleeding with the knife in Koichi's hand. Unaware that Tamami had actually cut himself in order to frame Koichi, The Lock on Ayana and Mrs. Hirose's chests multiply in size due to their guilt. Ayana cannot bear the heaviness of The Lock and falls to the floor. After Koichi gets his mom to believe in him, Tamami surrenders and removes The Lock from Ayana as well.[5]

Let's Go Play at the Mangaka's House

Ayana is on the phone with her friend when she notices Koichi run out of the washroom in a panic with only his boxers on. She asks him if he needs anything or wants to use the phone, but Koichi says he forgot what he needed. Ayana calls him weird and giggles to her friend that her little brother was just walking around in his underwear.[6]

Yukako Yamagishi Dreams of Cinderella

Ayana and her mother are out shopping when they stumble upon Koichi and Rohan. When her mom requests to come with them to Kameyu Department Store, Ayana goes along with them. Ayana's presence along with her mother's makes Yukako believe that luck is not on her side, as she wanted to be alone with Koichi.[7]

Chapters / Episodes

Manga Appearances
Chapters in order of appearance
Anime Appearances
Episodes in order of appearance



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