Aki as seen in Episode 4
|First Appearance||Episode 1|
The writers had so few ideas for her that she was largely written out of SFA as of Season 3.
Aki lives with her son, Fuyuki, and her daughter, Natsumi. The father, (revealed in Episode 18 to be Todd Sirkowski), is always gone, and she is usually out at work. Not much else is known about her, though she has openly flirted with Keroro several times, and he openly admits his attraction to her.
She has occasionally shown signs of ditziness, but in her own words she's likely just a goof.