It's important to remember that humor is subjective and often expressed through subtle actions and dialogue.
While no character is explicitly defined by their laughter, you might consider the following characters and their possible humorous traits:
* Miranda: Miranda is often described as playful and imaginative. She might be seen as having a playful sense of humor that manifests in her creativity and storytelling.
* Sal: Sal has a dry wit and can be quite sarcastic. He often uses humor to mask his own anxieties and insecurities.
* The "future Sal": The "future Sal" who sends messages from the future is full of contradictions and mysterious wisdom. While not a character in the traditional sense, his messages can be interpreted as having a humorous edge.
Ultimately, the "laughing character" in "When You Reach Me" is more about the reader's perception of humor. The story explores complex themes of friendship, loss, and the power of time, and the reader might find humor in the unexpected twists and turns of the narrative, or in the characters' unique personalities.
If you have specific moments or characters in mind, please let me know, and I can help you analyze their potential comedic aspects further.