Zeetha, Daughter of Chump/Mad

Cute Monster Girl
Zeetha bears a certain resemblance to Lum Invader, a popular main character of the 80s manga and anime Urusei Yatsura. Urusei Yatsura itself was quite popular in certain circles at one time, as in, one of the leading anime (along with Ranma 1/2) to be bootlegged into the US before anime took off enough for more formal commercial releases to take place, not counting Saturday-morning-compatible shows such as Speed Racer, G-Force, and Star Blazers. This was also before YouTube. We also know that Kaja Foglio, who just might be old enough to remember Urusei Yatsura when it was fresh to our Western shores, is a great fan of anime. Well, she must be, because the time frame in question is the early 90s, and Girl Genius has sketches dated back to 1993. Thus, it is unsurprising that someone like Lum, having a formative influence on Kaja, would be given an homage in Girl Genius.

And who is Lum Invader? A short description which emphasizes Zeetha's evident similarity would include: green haired, oversexed, alien princess with unusual fighting ability, including a couple of dangerous pointy bits — although in Lum's case these are literal horns whose chief danger is the magical power they possess. There's a bit more to Lum than that, though.