If opponent can casually kill duke family that means her enemy is same rank as duke or higher. I got feeling it's royalty, there many case royalty afraid when some nobles family grow too much or something alike.
This manga is worst! It's made me to given weird look because...
I LAUGHING TOO MUCH!!!
Honestly I don't like much about Tsundere as I prefer Kuudere. But she is exception because she too cute.