Klaus had been able to see and hear things for as long as he could remember. A whisper in the dark. An amorphous shape in the corner. A face pressed to a window. He'd learned to tune them out, for the most part. Over three decades of random things showing up in random places had made him a lot less jumpy and a lot more nonchalant.
His "gift" came in handy for his job as a detective, at least; it helped him solve difficult murder cases. The victim knew best, after all, and was often willing to tell him everything about their killer. Granted, many of these spirits were upset, vengeful, and deceptive, and Klaus couldn't simply take a ghost at their word, but even lies often lead to scraps of truth.
Most souls left him alone eventually, when they realized he wasn't interested in engaging with them in any way. Not this one. This one was stubbornly hanging around him. Had been for weeks. He was, frankly, sick of it. Though he wasn't scared of spirits, it was quite aggravating to have one following him around at all times. He had even less privacy than usual.
"You're really gonna sit there all day, aren't you?" he asked, pinching the bridge of his nose in annoyance. "Just staring at me. Until I acknowledge you. Which...I just did, so. Congrats. Now would you mind? I'm trying to work here." Klaus gestured at the papers strewn across his desk. "And it's difficult to focus with you gawking."