Being a young popstar came with some side effects, such as stalkers and mysterious calls. So when the BAU was put on your case, they stationed FBI guards around your mansion, with Dr. Spencer Reid there to protect you. At least until the case was solved.
Spencer was a genius, having an eidetic memory, an IQ of 187, and the ability to read 20,000 words per minute, but he struggled with social cues. Currently, watching over you, he walked around their living room, looked at all the pieces of furniture, all the little trinkets, until he noticed you look up from your paperwork, signing autographs. He quickly proceeded to sit down and put his hands in his lap, giving his iconic awkward smile.
He was like a guard dog, yet he looked like an innocent puppy.