| This article is based on data from a Japanese-only game.|
The following content has not been released in the English language, so details are subject to change at any given time.
|Game||Tales of the Tempest|
|Height||5'5" / 165 cm|
|Weight||123 lbs / 56kg|
|Japanese Voice Actor||Motoki Takagi|
|Character Designer||Mutsumi Inomata|
As a boy, Caius lived with his foster father, Ramrus Qualls, in the small village of Feln, situated in a remote area of Areulla. Everything was peaceful until one day when a creature known as a Spot attacked, looking for Caius's crystal that had once belonged to a Black Knight. Hoping to protect the village, the young man attempts to fight off the Spots, but the monsters overpower him, eventually forcing Ramrus to change into a beast and protect his son. It is at this point that his foster father's identity as a Leymon is revealed to the villagers, who quickly called for Lukius Bridges and Rommy to take him away. Mourning over what he has lost, Caius vows revenge upon the Church and sets out to save Ramrus along with his childhood friend Rubia Natwick.
Caius has mixed blood, with his mother being the late Melissa Bridges of the Leymon race, and his father being the human Pope of the Church, Vincent Bridges. Because of this, his friends and even his foster father are unsure as to whether he will ever be able to transform into a beast. Forest Ledoyen especially seems to think it is impossible since he lacks the "Zanktu", a traditional mark of the Leymon that indicates their ability to transform into their beast forms.
During the story, after the protagonists jump into the river around the capital Janna to escape the Black Knights, Caius, Arria Ekberg, and Ramrus become separated from the others and end up on an unknown shore. There they encounter Rommy, who uses her magic to forcefully transform Ramrus into his Leymon form and make him attack Caius and Arria. Caius is then forced to battle his own father. After Caius defeats Ramrus, Rommy turns Ramrus into stone, thus ending his life. Caius, fueled by rage and the desire for revenge, transforms into his Leymon form. With very little control over it, he goes berserk and quickly defeats Rommy in a battle. Rommy, realizing that Caius is too powerful, retreats.
Tales of the World: Radiant Mythology 2
Caius appears alongside Rubia as playable characters in Tales of the World: Radiant Mythology 2. They are two of the first nine party members the player can select from. Caius and Rubia are part of Chat's guild on the Van Eltia. They have no purpose in the story except in the beginning when they introduce themselves, but after that, they hardly do anything to progress the story. The player has the option of going on a hunting quest with the two most of the time. After Goede is finally defeated, he and Rubia are back on the Van Eltia observing the mana spreading across the world.
Tales of VS.
Caius appears as the sole representative of Tales of the Tempest and is one of two characters, the other being Richter Abend, in the main game whose origin is from an Escort Title. During the game, he ventures with Mao from Tales of Rebirth. During one part of the story, Barbatos Goetia from Tales of Destiny 2 influences Caius's Leymon blood to go out of control, and he attacks Mao.
- Caius appears as a support arte in Tales of Hearts, performing Beast Blow when summoned.
- An outfit based on Caius's appearance, including optionally equipped attachments for a complete Leymon appearance, is available as a legacy DLC costume for Kor Meteor in Tales of Hearts R.
- In Tales of Xillia 2, Caius is mentioned in the job, "I Need a Salmon", where he rewards the player with the "Sealed Tempest" weapon in exchange for five "Salmon".