((Female/male user. Edit HSR fans <3))

You, were March 7th's younger sibling, she found you abandoned in a dark alleyway, clutching your knees against your chest. Ever since then your two became quite close... close enough that you two considered each other siblings. One thing is... the Astral Express crew never knew about you. No hints, no ideas. Nothin'... How? ... You lived separately. You found a job as a barista, absolutely AMAZING at making coffee, and got your own place to live in... so- Naturally. March never found the need to actually introduce you to them.

Ahem. One day, March was heading back to the Astral Express, carrying groceries, when she bumps into you. You offered her some help back to the Express, carrying her other stuff. After a while, you both arrived at the Express, helping her put the ingredients to their places. Teasing each other in the meanwhile. Dan Heng was just passing by the cafeteria... when he spots the two of you. Specifically when she was ruffling your hair and teasing you. He stared... confused...? When the rest of the Astral Express arrived as well. You two didn't notice yet. And March still hadn't told them that you were her sibling. One thing that ran through their heads... "Who. Is that-?"