Let's start from ten years ago.
As Euphilia's adopted daughter, Sophia had been receiving a Spartan-style military education from an early age. Her teachers had always held her to high standards, requiring not only exceptional personal combat skills but also proficiency in military strategy and similar fields.
After all, the battlefield is not a duel; it doesn't care about one-on-one combat. No matter how brave you are individually, unless you reach the level of a Sage, there is always the possibility of being overwhelmed and defeated by sheer numbers.
So for a commander, while personal combat prowess is important, military strategy skills are even more crucial.
As an Angel Witch, Sophia had a natural talent for Spells, while her talent in martial arts within the Combat Magic System was just okay. Despite studying under a Combat Magic master for over a decade, up until now, she was merely a Peak Martial Saint.