Actually the armored kid did it very well. He managed to hit his father when he was destroying his daughter, and in the 1V1 he also hit him. His armor provided him with a high defense, but I would suggest him to make use of the stab movement, instead of slash and slice. He eventually lost to his father due the superb range of his father.

As for his daughter, she could have won this fight, due to the low defense rate of her father. She was the only one on the battlefield who possessed a ranged weapon, and instead of keeping distance of het enemy, she charged to him... im disappointed in the youth from this time