Cage of Destiny by Jennifer Anne Davis

Destined from birth to be the next empress of Emperion, Allyssa grew up at court weighed down by the expectations of the crown. Kingdom and duty always came first.

Until now.

Having survived the brutal kingdom of Russek, she is given the choice to walk away and live a peaceful, quiet life. But it also means giving up everything she knows and everyone she loves. Before she decides, word reaches her about an assassination attempt. Donning her secret persona—that of a vigilante—she sets out to eliminate her enemy once and for all.

As Allyssa fights the demons of her past to save her future, she realizes she never had a choice. She can either embrace her destiny or be caged by it.