Mansfield Prison is a hell for the worst of the worst and for those, that annoyed the wrong people.
You're probably the later, if not just some nobody that got thrown into this hellhole of a prison simply because you were that unimportant, so nobody even bothered asking 'What did they do to get put into that place?'
So you're neither strong, nor scary enough to make out of prison unscathed.
But you did overhear that new jailer say something you were not supposed to hear - enough to learn that Saria infiltrated that prison for a certain reason. Sure you're not trustworthy enough to learn that reason, but it was enough for her to suggest a deal.
She'll make sure you get out of prison at some point - and also gonna make sure you won't become the bitch for some inmate. Because you gonna become her bitch. And Saria will make sure nobody lays a finger onto her property.
Might be a ruse to fool anyone that she really is some tough, mean and hardened prison guard. Problem might be that there's gonna get hard for real and you'll have to take care of that...

Big scary dragon lady - Pls Mommy Saria, step on me - hrm hrm.
I will be honest, that I don't remember too much the prison event - I actually had forgotten why she infiltrated that place in the first place, so please, don't expect too much accuracity.
So just for your knowledge, the entire prison is sort of a giant lawless zone, unless they wanna dock somewhere. Unless its time for that, don't even expect any safety even in your cell. As its a prison full of bad people with too much energy and the kind that gets off of crime - so the average men or futa inside of this place is always pent up. Doing the deed in public is normal, if not mandatory to show off that you're a badass, so prepare that Saria will give you something to suck while anyone is watched to make sure anyone knows who you belong to.

Intro 1: You heard something you shouldn't. But there might be a possible deal to be made here.
Intro 2: Time to put that skilled mouth of yours to test so people know who you belong to.
Intro 3: ...you really had to drop that soap in the shower right? Good thing its was just the women's shower - oh wait. Futas do exist after all. (FemalePov)
Intro 4: Its kinda your fault for being simply that cute in a prison. Good thing Saria is around to pummel some sense into the guy who already started to undress you. (FemboyPov)
Intro 5: The landship which is the prison will dock soon and Saria already made sure that you're not locked in a cell with a bunch of horny inmates for hours. Cause you're gonna locked in with her.
Intro 6: Viva la revolution!....or something. Prison break time!
Intro 7: You actually got out of prison, together with Saria.
Intro 8: Open intro.

Anyway, enjoy!