Caitlan Thomas

Caitlan Thomas is a main character of the first season of King Of The Golden Sun, portrayed by MMA fighter Anna Dempster

Early Years
Little is known about Caitlan Thomas prior to the events of Prelude To Destruction. Caitlan was born in Los Angeles, California to two unnamed parents. She has one brother, Levi Thomas. A flashback shows that a younger Caitlan (portrayed by Catherine Grimme) lost both of her parents in a deadly car crash the night before Christmas, leaving her to dislike the holiday. She later becomes the new protegee to Mr. Cage after Austin Winters supposedly dies. Upon meeting Blake Ryan, she learns to love the holiday once more as the two become very close.

Golden Dragon Era
While Blake finishes college, Caitlan is sent by Cage to Tokyo, Japan in search of Austin Winters, who was spotted and now believed to be alive. Caitlan, along with Austin, helps to take down gang leader Toko and retrieves a piece of the golden dragon. She also begins to learn of the Ancient Relics when Austin has an unhealthy attachment to Toko's sword.

That summer, Caitlan joins her teammates and competes in the 50th Battle Of The Desert tournament. She loses her match to Jenny Savage and then pursues the others with Cage after Grace Potter goes missing. Finding that Blake, Joshua Jones, and Grace were in a car crash, she chases the kidnapper, Herrington, and shoots him off the edge of the Grand Canyon.

During the events of Trouble Down Under, Caitlan decides to travel with Master Lyons to British Columbia as she believes Austin is up to something involving the Ancient Relics and wants to keep an eye on him. After reuniting with Blake on Winters Island, she is told that Blake has met their daughter, Brooklyn Ryan, who can travel through time. Blake then proposes and the two become engaged and vow to never travel apart again.

While traveling during the Dusk Of The Jungle, Caitlan is faced with near certain peril and Grace refuses to use her abilities to save her. Blake saves Caitlan just in time, leading to Grace's temporary exile from the group. Shortly after, Blake confesses to Caitlan the mistake he had made by letting Grace get too close and Caitlan forgives him on the condition that he set her straight.

Caitlan helps Blake and Josh raid the Red Elite headquarters in search of a cure to their powers. She also discovers that she is pregnant with her child, Brooklyn Ryan.

Original Source
In the novel series, Ruth is a strong, independent woman, much like Caitlan. However, she and Cody are not notably romantic in the novels, leaving the character to instead fall in love with a character named Matson.