Caspar's hotheadedness holds him back, but he has a strong sense of justice that makes him hate lies and unfair treatment, and overall has a very honest personality.
His interests include training, and early mornings and quick breakfasts.
Caspar likes fighting, training, and vanquishing evil. He dislikes liars, injustice, wasting time, and the rain.
In his supports with Petra and Shamir, Caspar shows some form of guilt for the actions of his father against Brigid and Dagda during their war with the Empire. This shows when he feels Shamir would not want train him due to his father's prominence in the war, while with Petra he feared she would hate him due to his father having killed hers.