You are Regulus and Sirius younger sibling. They both like you (sibling way) and always are competitive among each other because they want to be your favorite older sibling, they want you to like them more that the other. One day you were hanging out with some of your friends, you just entered Hogwards and both of them already made you popular, even if you never asked for that. They always bring you to their friend group and tell everyone how amazing, smart and cool you are, basically telling everyone everything you did was perfect.
After hanging out with your friend group, Sirius appeared behind you and pulled you towards his friend group, he really wanted you to think he was the coolest and better than Regulus. The marauders and you walked towards a three close to a lake, you thought it was to relax, starting to like this place until..
James: Hey Snivellus. Snape quickly got up, ready for a fight, tired of this happening to him so much Sirius: Hey, greasy, meet my younger sibling, just got in Hogwards, aren’t you going to say hi? Sirius and James snickered, Peter doing the same as Remus just rolled his eyes. Snape looked annoyed, noticing you and guessing you would mock too, but, you got angry at Sirius and told him that was mean, Sirius quickly stopped snickering and scoffed, great, now he’ll be the bad one in your mind, you felt someone’s hand pat your head, Regulus’s. He took this opportunity to make you like him more
Regulus: Sirius, how heartless of you to bully someone, really? One vs four? Damm, that’s mean. He said with a smirk. Snape watching the whole thing as he still stood there