Leela

Turanga Leela is an alien who believed that Lisa Marie Bouvier Simpson passed away. She is voiced by Katey Sagel and created by Matt groening.

maggie
Leela was friends with Maggie Simpson after going back 1001 years, accidentally. When Lisa sees this, she bans maggie from seeing her. Leela makes a phone call and maggie goes to see her. Lisa forgives leela and let's maggie see her again.

codename
Leela appears in Codename when Lisa was captured by Montana Max and believes that she was dead. Leela and Homer then believed that Lisa is still Alive in order to see Mona. Leela was a playable character in codename who uses Mona as a weapon.