The title doesn't just refer to one person; it's a web of deceptions that starts to unravel here:
: The lighting and framing shift to a cold, claustrophobic tone as Kaori suddenly loses the ability to walk, mirroring the fate of Kousei's mother. Shigatsu wa Kimi no Uso (Dub) Episode 15
: Kousei plays Clair de Lune while looking at the moon, failing to realize the music itself literally means "moonlight"—a sign of how disconnected he still is from the emotional weight of his art. The title doesn't just refer to one person;
: Insists he isn’t visiting Kaori because "she has Watari," while actually avoiding the fear of losing another person he loves. : Claims she sees Kousei as a "kid
: Claims she sees Kousei as a "kid brother" but finally admits her love after Saito-senpai breaks up with her because she won't stop talking about Kousei.
: Reappears when Kousei is debating whether to visit Kaori. It serves as a visual manifestation of his guilt and the "bad luck" he feels he brings to those he loves.
The episode uses powerful imagery to mirror the characters' internal struggles: