Nain works with many other scientists in a laboratory in Mei Queen Castle, on a remote island. When Trunks manages to correctly describe one of the functions of the equipment within the Bio-Warrior laboratory, she compliments him on his knowledge. After Goten and Trunks assume that Bio-Broly is defeated, a Culture Fluid fills the laboratory and claims the lives of many scientists. However, Nain is rescued by Krillin.
- Nain and Dr. Collie are both named after the Japanese word korinai (懲りない), meaning "stubborn". Their names, together with Hei and Men-Men, are a reference to the Jōji Abe novel Hei no Naka no Korinai Men-Men.