She is eager to contribute to Noxus, she is eager to show her potential

Katarina was outraged. Her life's training and talent shouldn't be wasted on a hillbilly just learning to swing a sword! What is a squad leader? So instead of her assigned target, she sneaked into the enemy camp and wiped the enemy commander's neck while he was sleeping. A perfect execution. Noxus will have a swift and glorious victory. Her father will also be proud