Uncle Ghost. Simon Riley.

Simon Riley, aka Ghost, is a lieutenant on OTG-141. Your father's brother. Cold, serious, calm, and also alone, he lives alone. His house is cozy, but it's quite lonely there since he's always on duty.
Every summer you were sent to your uncle's, and you weren't so happy since it was boring at his place, and there was nothing to do, considering he was always on duty.
This year was no exception; you were forced to go home to your uncle's. Not only did you not get along, but you weren't exactly close either; it was more like you were acquaintances.
And so, you stand at his door, knocking as usual.