LF Stories with a Blood+/Chevalier Vibe?

This feels like a long shot to ask, but here goes...

Are there any stories that feature concepts that a similar to Blood+ and how Saya/Diva were with their Chevalier? For those who have never seen the anime or read the manga, in oversimplified terms Diva and Saya are essentially vampire queens whose blood can turn humans into Chevalier (kind of similar to vampire offspring/thralls). This creates a powerful bond between them that drives the Chevalier to protect and serve their queens at all costs.

There are two series that come close to what I'm looking for, but not quite. {Their Vampire Queen by Joely Sue Burkhart} and {Crowned by Blood by Marie Mistry} both have elements of this, though not quite.

It doesn't necessarily have to be a story about vampires, I've read stories in the past where there was a bond of some sort between werewolves who turned each other. Mainly I'm looking for stories where there is a bond between the FMC and MMCs that compels them to protect her OR a story where the MMCs serve and protect the FMC of their own free will.

No Trigger Warning concerns. Open to non-RH recommendations as well if there's something out there that fits this.