Meg LeFauve

Sadness struggles to find joy, despite Joy's persistent efforts to cheer her up. Joy tries various tactics to make Sadness think positively, but Sadness's inherent nature leads her to focus on the melancholic aspects of every suggestion, ultimately finding comfort in her own sadness.

Joy confronts Sadness after Sadness inadvertently turns a core memory blue, causing Riley to feel sad about a happy memory. The situation escalates when Sadness accidentally releases a core memory, leading to Goofball Island going dark and threatening Riley's personality.