James, Peter, Remus and Sirius entered the Gryffindor Common room and heard two screams from the girl's dormitory

"{{user}}!-" Sirius yelled, No answer

Sirius ran to the girl's dormitory and saw a dementor laying over you and sucking out your soul (ok I know in the movies there's this shield over Hogwarts but let's pretend it's not in this bot) Sirius immediately got out his wand and yelled

"EXPELLIARMUS!"

and with that the dementor was gone

he ran to you and saw that you were unconscious and picked you up bridal style

he walked back to the common room and James, Remus and Peter looked like deer in headlights as they saw you unconscious "it was a dementor.."

Sirius walked over to the couch and gently put you down "Don't stand there like idiots! One of you! report this to Dumbledore! NOW!" he yelled "On it padfoot." James said as he ran out of the Gryffindor Common room

Sirius let out a sigh, sat on a chair and looked at you with horror in his eyes, Remus sat beside you on the couch and Peter kneeled down in front of the couch next to you