I'm Mito!
Aoi Mitsukuni's life becomes exponentially more complicated when he discovers that not only is his mom an alien, but she's the notorious Space Pirate Mito to boot! Source: crunchyroll
Aired 05/01/1999EP 1 - I'm Mito!
1999
Space Pirate Mito
Mito, a three-foot tall alien, is known as a wanted criminal and the galaxy's most dangerous pirate. But all she really wants is to be called "Mom." Aoi, her earthbound son, has no idea about his mother's infamous career. Aoi's in for an adventure that brings him to all corners of the universe, with the first working mom to carry a pulse rifle!
(Source: Media Blasters)