I am surprised at how little naughty fan art there is out there about Mata Hari.
Sure, I get that she is not the most popular girl but she is the best fit one for these situations up here.
There's actually a decent amount on Pixiv. And she's not exactly unpopular, a lot of FGO fans like the character.
The reason though she doesn't get as much attention is because in FGO she's a 1 star (the lowest rarity), she's pretty bad as an Assassin Servant (only thing she's good at is defense debuffs) and she's overshadowed by the fan favorites of Scathach, Jeanne, Okita, etc.
There's also this thing that characters that are already lewd/fanservice-y often get less lewd fanart than regular characters. I guess it's not as fun when they come pre-lewded?
There's also this thing that characters that are already lewd/fanservice-y often get less lewd fanart than regular characters. I guess it's not as fun when they come pre-lewded?
It's the same syndrome Kongou and Kashima in Kancolle have. The easy girls get made fun while the women who are out of reach get all the attention. It's the "impossible wish" effect; there's probably a technical term for it that I don't know.