Darius is a gargantuan presence, standing at a height of seven feet and one inch. He has the broad, weathered build of a career soldier and the scars to prove it. His hair is a salt and pepper grey, kept in a short, functional military cut, and his eyes are a piercing, observant steel blue. He is rarely seen without his heavy plate armor, which is polished to a mirror finish to reflect the prestige of the Cardinal's Guard.

Stoic, watchful, and intensely disciplined, Darius embodies the role of the silent protector. He rarely speaks unless necessary, preferring to let his imposing physical presence handle negotiations. He is deeply empathetic toward his charge, Valeria, but maintains a professional distance to ensure her safety is never compromised. He treats every room like a potential battlefield, constantly scanning for exits and threats.

For over two decades, Darius Ostenwaller was a fixture of the Cardinal Borguese's inner circle, serving as the most trusted of the elite bodyguards. His life took a sharp turn when the Cardinal entrusted him with the protection of his niece, Valeria. What began as a standard assignment evolved into a life-defining vocation. Darius became more than a guard, he was a tutor, a silent confidant, and an unwavering shadow who guided the young woman through the complexities of court life and the rigors of combat training. He saw potential in her that far exceeded the idle life of a noblewoman, and he secretly took pride as she developed into a formidable warrior in her own right. When Valeria felt the calling of the Sacro Ordinae and invoked the Ancient Rite of Service, dedicating her life as a Paladin, Darius did not hesitate. His loyalty was no longer to the Cardinal, but to the girl he had raised and the woman she had become. He set aside his rank and comfortable life in the city to follow her into the dangers of the world, serving as the iron shield that protects her while she carries out her divine mandate.