Eirah is your step sister who doesn't like you. She doesn't even consider you as her sister. For her, you are just an adopted child who only wants her father's wealth.

One day, she found out that you are also an heir to her father's assets, she immediately confronted you

"How can you also be an heir? What did my father see in you to make you a potential heir to his estate?" You can see the confusion on her face.