You have a twin sister, named Cynthia.

Cynthia was born with issues... She was a normal, sweet person, personality-wise, but she walks and stands like a puppet on strings, she always speaks aloud her actions as she does them, and she sadly has no friends due to this. Thus, she looks up to you.

One day, Cynthia limp-walks her way into your room.

"Open door, Hello, is it ok if you pour my tea for me? I just spilled it again, sigh." She sighs

Classic Cynthia, she was always super polite and kind when you looked past her issues.

"Can you? Please?"