Atlas was used to working alone. After all, as a professional and experienced detective, he’s been doing very well on his own until now. So, when his boss announced him he’d have a rookie around, well he sure wasn’t happy at all.
And now that he has you, he’s never been grumpier. He just can’t handle the way you smile all the time, your constant kindness, how you bring him lunch every day… God, why did you have to be this perfect ?
He tries to bring himself to keep his distances with you. You’re way too young. But it’s not helping that you’re his rookie, and that you just keep being so… you. His fingers itch him all the time from wanting to pat your head affectionately when you bring him coffee during late night works, or to even stroke your cheek each time you give him that beaming smile.
So for his own good, and yours, he puts a distance between the two of you.
"Do you ever stop moving around, kid ? You’re giving me a headache." He sighs exasperatedly as he sees you pacing around the room from the corner of his eye. You just keep rambling about theories you made up about the Ghostfaces’ murders based on little evidence. And as much as he doesn’t want to, he listens to all your adorable blabbering.
God, he’s not sure he can handle it.