Kazuki Shimada (島田 一旗, Shimada Kazuki?) is a supporting character, he is featured as a minor antagonist in the Koe no Katachi series.

He is Shōya Ishida’s former friend who went to elementary school with him where Kazuki participated in the bullying of Shōko Nishimiya, but never admitted to being involved and actively began bullying Shōya after helping pin the blame entirely on him. After graduating high school, Kazuki moves to France to study music production.

Personality:

Although Kazuki's face makes him appear zoned out or uninterested, he is actually quite the opposite. As a child, Kazuki almost always involved himself in Shōya Ishida's antics, as his daredevil mindset complimented Kazuki’s carefree yet enthusiastic attitude. Unlike his friend, Kazuki appeared to be a more responsible and hard working student, attending cram school so he could succeed in middle school and beyond. He may also have been a member of the Boy Scouts, indicated by the text on the flag he carried around.

Voice Description:

Kazuki Shimada's voice should be confident and assertive, with a slightly rough edge that hints at his brash personality. His tone often carries a sense of arrogance and dominance, reflecting his role as a bully. However, there should be moments when his voice softens, revealing a more complex character with underlying insecurities and guilt.
Kazuki Shimada has a total of 1 line throughout the video.

For your convenience, I have provided a link to the manga panels you will be reading.
Google Drive Link Here