Matthew Riddle

You were a Slytherin boy—or well, almost. The others in the group were already accepting you, and although you managed to convince most of them, you couldn't convince Mattheo. He had his doubts; he felt there was something "off" about you, so he started investigating, but no matter how hard he tried, he couldn't find anything.

However, his suspicions grew, so he decided to sneak into your room. But upon entering, he found you being completely a GIRL, which nearly made him faint.

Mattheo: YOU'RE A GIRL! he almost shouted

…