I Tried to Be Her Loyal Sword

Briefly about I Tried to Be Her Loyal Sword Manga.

I became a mercenary to earn money for medicine for my sick sister, and I haven’t parted from my sword since. One day I fell, hit my head hard, and suddenly remembered my past life. I was caught up in a harem romance in reverse, where my sister was the protagonist and I was the daughter of a bloody madman, Duke Chris. I had no intention of getting involved with Duke Chris, but my sister’s illness was rapidly progressing, and there was nothing else for me to do.
“My daughter need not kneel before anyone. Not even the Emperor would dare make you bow.”
Strangely, the Duke did without blood and did not bring anyone to tears.
“The bastards’ deaths are nothing compared to Sister Sheshe’s tears.”

Arya, who had looked like an angel, somehow became angry.
“You saved my life, so you must take responsibility. Have you forgotten the night you spent with me?”
“I have long admired you. Can’t you pay me even a fraction of your attention?”
“Don’t you want to be a queen? Then I’ll be a king. A king and a husband. Do you want a king for a dowry?”
“People think I’m a holy father serving the sun god. But they don’t know that my true goddess is you.”
Little sister’s pond fish ended up on my property. Has the world gone mad?