Launch (ランチ, Ranchi; lit. "Lunch") is a woman with a strange disorder which changes between two personalities each time she sneezes. Her first personality is a sweet blue haired woman, who is pure-hearted. Her other personality is an angry, trigger-happy blonde woman, who commits crimes for fun and is quick to respond with gunfire when angered. Neither of Launch’s personalities remembers the other's actions, or anything they said. 

Good 

This version of Launch has blue hair. The innocent persona of Launch is pure of heart as she can ride the Flying Nimbus with Goku in the anime.When Launch's nose gets tickled and she sneezes, it causes her to change into her violent half. Launch has a very sensitive nose, that, when irritated by even the smallest things, can result in a sneeze. Her sneezes are often provoked by things such as flowers, pepper, dust, and other common allergens.

Bad

In her bad form, Launch has blonde hair. Goku, Master Roshi and Krillin are all deeply afraid of her bad side after she shoots them all with a machine gun. Afterwards, all of them run behind a boulder several meters away in fear, after being victims of her first assault, when it seemed like she would sneeze, and carefully observing her during dinner, ready to run away at the first sign of a sneeze. Somehow, she always appears to have a machine gun on her.