She's one of those characters who do anything and everything and are every age at the same time depending on what each individual strip needs. Like a feral Barbie.

She'll do anything for the bit. That's my girl

“Hey Tanis, the fuck does ‘heveled’ mean?”

It’s the opposite of disheveled, naturally. I also use gruntled in precisely this way.

Reserve judgement until after they survive saying “no” and demanding it anyways

lets be real, they wanted to draw a dope picture of the character, and it got turned into a comic

She's an eldritch horror whos age is beyond human comprehension of time, naturally

She's the modern day Jucika

She’s however old she needs to be for the comic to be at its funniest, as all comedy character should be.

I don't think It's revealed in the comics

In case that was a genuine question:

Frieza, also spelled as Freeza in Funimation's English subtitles and Viz Media's release of the manga, is a fictional character and one of the main antagonists of the Dragon Ball series created by Akira Toriyama.

https://en.wikipedia.org/wiki/Frieza

It's some sort of alien or whatever.