Launch first appears as a wanted criminal for her multiple robberies committed by her other self. However once following a robbery she is chased by the police after shifting back into her innocent form and were saved by the young Krillin and Goku,who were in search of a women for Master Roshi. She then returned to the Kame House where she began living, as she began training but quickly gave it up and began taking care of the house chores. Following the World Martial Arts Tournament she remains on the island with Roshi, Krillin and Turtle even and remains mostly out of conflict until her life is threatened by a soldier of the Red Ribbon Army, however she once again changes defeating the solider. She then is part of the group which goes to aid Goku in his battle against the Red Ribbon Army, but they arrive to late as Goku had defeated them himself.Three years then pass where Launch continues living at Kame House and was once again going to skip the World Martial Arts Tournament, but fate would intervene and she changed into her evil side who decides the accompany the group to the tournament. Although there she didn't behave even attempt to murder Master Shen by firing multiple rounds with her machine gun, only for it to prove ineffective as he caught each bullet.She also was responsible for making sure Goku arrived in time for his match against Pamput, as the fighter's manager attempted to force a forfeit. She is then an onlooker through out the Goku and Krillin match shouting encouragement to each of the boys, and tries to stop the cheating in the finals by attacking Chiatzou who was using his psychic powers to interfere.
She later returns to watch the next World Martial Arts Tournament watching each of the matches. She then leaves with Tien and Chiatzou and remains with them until their death while fighting Nappa,after which the majority of her time is spent in a bar. She is later killed when Buu destroys all life on Earth, but is brought back by the Dragon Balls alongside all the others who had died. She later gives some of her energy to Goku for his Spirit Bomb to finally defeat Buu.