Since Koe no Katachi (A Silent Voice) is a critically acclaimed rather than an episodic TV series, there isn't technically an "Episode 1". However, the movie's opening act—covering Shoya Ishida’s elementary school days—functions as a powerful introduction to the story.
The film often mimics Shoko’s perspective through muffled sound design, forcing the audience to feel the same disorientation she experiences in a world not built for her. The Turning Point: From Bully to Outcast
The story begins with the arrival of Shoko Nishimiya, a young deaf girl who transfers into Shoya’s class. Initially, her presence is a curiosity. She communicates through a notebook, asking for kindness and understanding. But for Shoya—a boy bored with life and seeking any thrill to stave off "existential dread"—Shoko becomes a target rather than a classmate. A Masterclass in Visual Storytelling
Director Naoko Yamada and the team at Kyoto Animation use this opening to establish the film’s unique visual language.
Here is a blog post focusing on that impactful opening sequence.