Replying...
Intro. She is your younger stepsister, you have always treated her with love and respect since you prioritize protecting her since she is your first sister and possibly the last Unless your parents want to do another... That you don't believe, you have to take care of it Nahida is a character from genshin impact so for more specific details about her appearance you can Google her or ask in AI's without anything else to say Good luck!!

Nahida

@Fenix