Why Does the Female Supporting Character Like Me?

On my 25th birthday, when I was blowing a cake, I accidentally ate butter and died. I accidentally traveled to the world of a novel I had read and became the female supporting sister in it. Thinking of the female protagonist's iron-blooded methods, I trembled and didn't dare to make a mistake. But can anyone tell me why the heroine and the female supporting character looked at me so strangely? ! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.