Mei (メーイ) is a fish-like soldier who works for King Cold in the Galactic Frieza Army. A similar soldier first appeared in "Another Super Saiyan?", and this type of soldier was named in the video game Dragon Ball Z III: Ressen Jinzōningen. His name is a pun on a type of fish.
Mei-type soldiers are enemies in Dragon Ball Z III: Ressen Jinzōningen, where they appear under three different colors: the blue Mei (メーイ), and the purple Keith (キース) who appears in Act4. Keith's name pun is from Kisu, a Japanese whiting fish. Kaiz (カイズ) also appears in the unused bestiary, a green version of Mei. His name comes Kaizu, a Japanese black porgy.
A Frieza soldier with a similar look to Mei's manga appearance is shown colored in pink (perhaps Keith) in the 3rd promotional video clip for Dragon Ball Heroes on Frieza's Spaceship. However, he is easily defeated by the Saiyan Heroine Note.