ZX Followers are literally followers I have made for myself that I have shared so everybody could enjoy them!
My followers are essential meaning they are immortal, they are also set to level with you and not affect your stealth meter.
And yes, you can marry them.

I can not guarantee they are bug free as Skyrim is not bug free!

The followers are pretty much normal followers you will find in the game,
I did not wish to create "cheaty" followers, but my followers are based on highly powerful beings.

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Delilah is a breton vampire female living in broken fang cave, she was the partner of a vampire lord,
they are currently having a argument, is that the sound of distant fighting?

She has the normal vampire robes (armour if you have Dawnguard installed) and a simple dagger.

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Vhakia is a dremora female trapped in the Shrine of Mehrunes Dagon as a reward for being non-compliant with his wishes.

Vhakia is equipped with enchanted daedric armour and weapons forged in the fires of oblivion.

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Works better with Dawnguard and “Amazing follower tweaks” or a similar follower mod.