From the in-game profile
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Azusa lost his parents at a very early age, leaving him alone to take care of his younger brother, Tsukasa. Azusa found work as an onmyoji, or court wizard, to a noble family, raising Tsukasa simultaneously. Sadly, Tsukasa contracted a deadly disease and later died, leaving Azusa devastated and alone.
At some point after Tsukasa's death, Azusa was approached by a Nue, a magical creature of darkness. The Nue convinced Azusa that it could return Tsukasa back to life. Azusa later met Randy March, who had travelled to Hinomoto and was staying with the same noble family. Randy attempted to befriend Azusa, but it wasn't until Randy told Azusa about unicorns in Gedonelune that Azusa showed any interest. Later, Azusa travelled to Gedonelune with Randy and enrolled at the Academy as an exchange student.
Azusa serves as the main antagonist of the Spring of Unicorns Mystery Series. His fate differs depending on the route played.
Klaus' Route Edit
Randy's Route Edit
Azusa's Route Edit
When initially introduced, Azusa appears to be quite kind and polite, offering MC candy and sharing facts about Hinomoto. Azusa's real personality is quite blunt and rude, but when romanced, he does show genuine care for the MC through his actions.
Magical Abilities Edit
Azusa's magical abilities are derived from Hinomoto magic, which is an entirely different system of magic than found in Gedonelune. Azusa casts by tracing Hinomoto characters in the air, and also occasionally utilizes magic circles or ofuda. Unlike wizards in Gedonelune, Azusa does not need a wand to cast, nor does he need to physically speak, giving him an advantage in certain situations (such as underwater).
As Hinomoto's magic system does not include light magic, Azusa is unable to cast this school of magic.
Azusa Kuze name's his son Tsukasa in his Happy Ending