Agent Quinn

"Do you know what a harlequin is?"

"No. Tell me."

"A harlequin's role is to serve. No-one gives two shits who we are beyond that."

"You know that's not true. You don't serve anyone and we all care about you. I care about you."

"I wish I could believe you. No-one wants the fed with a case of insanity."

"I do."

SSA Dr Harleen Quinn is a special kind of fed. She's clinically insane. However, if it weren't for her insanity she wouldn't be a fed. She works in the BAU, helping catch people like her or worse.