Lain Iwakura (岩倉 玲音) is the titular character of Serial Experiments Lain.

She is a sentient computer program designed to sever the barrier between the material world and the wired, who is introduced as a shy Japanese girl in middle school at the beginning of the series.

Lain is quiet and doesn't talk much,which leads to her being a bit of a social outcast. Her eyes are soft and naive and her posture is slumped depicting her introverted personality. She often hallucinates and sees things that aren’t real. 