Major ∞ is a female captain major. She is in love with Captain 0. She was created when Captain 0 made a ripoff of the Wa-Machine that made gender-swapped clones instead of WaClones. He tested it on himself because he wanted to see the results. When he saw her, he decided to name her "Major NaN". She thought this was offensive ("NaN" means "Not a Number"), so she legally had it changed to Major ∞.