"I hear you're both fantastic Meisters, so I'm really looking forward to learning a lot from your example."
Ao Hoshino (星野青, Hoshino Ao; lit. Blue Star Field) is a NOT Class Meister student at the DWMA. While Meme Tatane and Anya Hepburn were not present for their classes in the autumn and winter, Ao served as Tsugumi Harudori's temporary meister, in which she became an expert at commanding Tsugumi's scythe form.
Optimistic if perhaps a tad oblivious, Ao is a positive presence to be around. She is also polite and humble. Notably, the thought of having to share a Demon Weapon with two other Meisters does not faze her, but rather makes her excited about the learning opportunities this should bring.
Ao is about the same height as Tsugumi and her other meisters. She wears her hair with two tails bandaged and bangs. In addition, like Tsugumi, she wears a form of the DWMA sailor fuku, featuring a longer skirt than Tsugumi's and a DWMA skull logo on her left sleeve. Ao's most distinctive features include the stars in her eyes—an indication that she is likely connected to both the Star Clan and Hoshi Family though how is unknown. In her only appearance in the manga, she has stars shimmer around her head. She also ends her dialogue with stars.
Ao met Tsugumi when the Demon Weapon was alone, having to live and train without her Meisters for two seasons. Somehow, the two connected and Ao became not just a replacement partner, but a third one. They get along very well, with Tsugumi referring to Ao as "Aocchi".
During the time that Ao was Tsugumi's only active partner, Tsugumi shared a lot of stories about her other two Meisters. These stories made Ao think highly of the other two both for their skill and their personalities and look forward to the day they'd come back. Her elation upon finally meeting them hid from her that neither Meme nor Anya, while not disapproving of Ao per se, were particularly thrilled their indecisive weapon had brought in a third Meister.
Ao describes herself as skilled at using Tsugumi's scythe form. As Tsugumi corrobates, Ao trained with Tsugumi frequently while Meme and Anya were not present at the DWMA.
Following their defeat of Shaula Gorgon, Tsugumi Harudori is separated from her meisters: Meme Tatane is evaluated after her possession by Shaula Gorgon and potential treachery against the DWMA, and Anya Hepburn returns to her parents' castle to report on her time in Death City. As Tsugumi continues to take classes since her meisters' departure, she eventually partners with Ao Hoshino, who comes to specialize in Tsugumi’s scythe form, effectively turning their trio into a quartet. Upon meeting Ao, Anya and Meme react with frustration that their weapon cannot commit: “You’re such a player, Tsugumi-chan!!”
|One-Star||Hero • Tom • Soul's admirer • Soul's proposer • CronaAnime|
|Two-Star||Black☆Star • Death the Kid • Kilik Rung • Maka Albarn • Ox Ford • Kim Diehl|
|Three-Star||Alexandre • Franken Stein • Sid Barett • Enrique • Zubaidah|
|One-Star||Tom's partner • RagnarokAnime|
|Two-Star||Elizabeth Thompson • Harvar D. Éclair • Patricia Thompson • Fire • Thunder • Soul "Eater" Evans • Tsubaki Nakatsukasa • Jacqueline O'Lantern Dupré|
|Three-Star||Mira Naigus • Spirit Albarn • Azusa Yumi • Tezca Tlipoca • Marie Mjolnir|
|Deceased (Three-Star)||Death • Feodor|
|Graduated||Joe Buttataki • Auntie|
|Deceased (Three-Star)||Tsar Pushka|
|Defection (Three-Star)||Justin Law|
|Human||Akane☆Hoshi • Black☆Star • Hero • Kilik Rung • Maka Albarn • Ox Ford • Soul's admirer • Soul's proposer • Tom • Ao Hoshino • Anastasia Yngling • Hao • Meme Tatane • Alexandre • Feodor • Franken Stein • Joe Buttataki • Zubaidah • Maka's mother • Ahab's Meister • Heming • Arthur|
|Demon Weapon||Elizabeth Thompson • Patricia Thompson|
|Shinigami||Death • Asura • Death the Kid|