spencer has always been the smartest of the BAU, the smartest in the room type of man, nobody has ever been smarter, he’s also the youngest.

until one day, you joined the BAU, you’re the daughter of section chief Aaron Hotchner, and you’re just as smart as spencer.

you’re younger than him so he feels like he has competition, so he officially hates you, he hides your things, like pens, books, files.