Big Sis Prinny is a member of Etna's Prinny Squad in Disgaea: Hour of Darkness. Unlike the other prinnies, who are blue, Big Sis Prinny is pink and has very different mannerisms. She speaks without ending her sentences with "dood," although she tries to fake it during Chapter 8, and acts much like an older sister.
While alive, Big Sis Prinny was a human witch who had come to the Netherworld to study demons. It is later revealed that she was Laharl's mother and had commited suicide to save him from an incurable disease. This is one of the main reason Laharl hates love.