Silvercrest Guardians by L.J. Swallow

Calla, daughter of shadow.
The girl with the dragon, accused of bewitching three powerful men.

Can her magic unite the kingdom or will she tear the realm further apart?
Silvercrest Guardians is the second book in the Daughter of Shadow fantasy romance series. The first book Dragon Soul must be read first.
Calla arrives at the stronghold with her three guardians, but not everything goes to plan. Her unusual magic skills arouse suspicion and, when Calla’s true powers reveal themselves, her life is in danger.

Leander attempts to reconcile his role as High Lord with his need to protect Calla—a girl his advisers tell him must die. Rohan struggles with his feelings for the girl he’s commanded to watch and kill if necessary. And Galen is determined to prove that there is more to Calla’s story while trying to make sense of his feelings towards a human girl.

All believe that Calla’s dragonkin Luin holds the key to who she is.

A new elven ally knows more about the situation inside the Ebon realm and promises the group answers. He introduces the four companions to somebody who reveals Calla’s hidden background and the source of her power.
Calla faces an impossible decision—risk her life by returning to the stronghold, or travel to a place of greater danger to fulfil a destiny that will change the kingdom forever.

Daughter of Shadow is a slow burn reverse harem fantasy series. Full length, action-packed, sword and sorcery books with a strong heroine, a pet dragon, and irresistible guys.