Fun fact; Sex Demon Queen was done by the same people who did Excel Saga and fans of both may see similarities between characters of both series. I've only ever watched it once, about 10 years ago, so I couldn't list them now.
Interesting side-fact #2; Koshi Rikdo, the mangaka for Excel Saga worked the H-doujin circuit and the Excel Saga characters all stem from his early H-doujins, much like Kohta Hirano's H-doujin characters being reused in Hellsing. Kohta Hirano was best friends with Inazuma, another H-doujin artist who worked in a circle with Koshi Rikdo and eventually become his assistant on the Excel Saga manga. You may recognise the name Kohta Hirano, Inazuma used the name of his friend to name the character of another chubby military otaku character that appeared in their famous manga, Highschool of the Dead.
And so wander did win the internet for the day.