Ai Lao

Rou Ai was brought to the Royal Harem by [Ryo Fui](https://anilist.co/character/66705/Buwei-L) as a eunuch, but his real role was ~!to be the [Queen Mother](https://anilist.co/character/188824/Bi--Ki)'s pleasure partner.!~ He went on to become king of the state of Ai. He is said to have a penis stiff enough to hold even the wheel of a cart.