The Bridge Series by Erik Schubach

Evangeline Kane is thrust into a world and a role she never asked for. She finds herself questioning her sanity as she finds herself bound to a bridge as its Troll when the previous champion died in her arms. The gateway from the Under-Veil to the city of Cincinnati lies unprotected, open to malicious fae intent on chaos and corruption of the mortals that dwell in it, if she does not stand against them.

Murder and mayhem ensue in the city when a Troll is murdered. There is discord in the supernatural world in Cincinnati when the Trolls find there is a traitor in their ranks and Evangeline Kane is the prime suspect. A rift in the ranks of the city's champions is formed that threatens to descend into rebellion. On the run from the sentinels of the city, the Triumvirate, and the mortal police. Evangeline must fight against time to clear her name while protecting the gateways of two bridges.