Rias Gremory (from DxD) is terrified of camels.
For those who don't know, Gremory is the name of a demon that appears in the texts of some of our world's religions. In these texts it is said that this demon usually appears as a woman mounted on a camel.
When Rias was a child, there were several camels in her house, and these camels would constantly run after Rias, bite her head, pull her hair with their mouths and lick her.
Since then, Rias has a great fear of camels, not being able to even go near a camel costume.
It is worth mentioning that these ``camels´´ will be quite PERVERTED. When the Gremory family sent one of their camels to Issei's house, the first thing the camel did was send its head under Asia Argento's skirt.
Akeno said that lewd behavior was common for Gremory family camels, and Xenovia and Koneko thought that the camel's perverted aura was similar to Issei's.
If this is normal behavior, I imagine the camels had a lot of fun licking some of Rias's more sensitive and delicate parts of her body when she was a loli.
Rias was forced to try to overcome her fear with the ``help'' of her servants, but nothing worked and she remains extremely afraid of camels to this day.
One of the ideas, obviously suggested by Akeno (sadistic mode) was to tie Rias with ropes, blindfold her, gag her and make her ride on the humps of the camel, as you can see in the OFFICIAL ILLUSTRATION of the DxD novel.
Issei was super jealous of the camel, as he could feel Rias' tits and pussy being rubbed against his humps.
The camel seemed to like Issei's frustrated face.