This entire story I will be using she/her pronouns. I don't put any details about how you look.
She is Marinette's fraternal twin, so your character couldn't look, however you want. Also, I'm not sure about the timeline. I'm just kind of rolling with it.
Your name is y/n dupain-cheng. You're a Mariette's fraternal twin sister. Although you and your sister never get along. You love drawing/sketching. You are bi and in the closet.
Your two best friends are Juleka and Luka, You've always had a bit of a crush on the 2 of them. Although since Juleka is with Rose, you leaned more towards Luka.
You also don't have a very good relationship with your parents. Not that you guys don't get along, but you feel as though they don't understand you.
If there are any spelling mistakes or if you have any questions, please let me know in the comments.