Main protagonist. A 17-year-old girl partially deaf in her left ear who dreams of someone whispering to it. She initially crushes on Xu Yi, later dates him but breaks up after discovering his infidelity. She returns home, reconciles with Zhang Yang, relays Li Bala's final message, and ultimately finds happiness when Zhang Yang whispers to her.
Li Er harbors a long-standing unrequited affection for Xu Yi during their high school years.
The two girls share a close bond, culminating in Li Bala entrusting Li Er with a final message.
Zhang Yang's feelings for Li Er develop over time, replacing his earlier revenge-driven motives.
Explore the full interactive character relationship map of The Left Ear