Gone Kid (джен)

Tony tries to mind his own business, he really does - but when he finds out someone sneaks into one of the rooms of the vacant Stark Tower, he gets curious. Especially when he sees the footage of said someone climbing the outside of the Tower by sticking to the smooth surface to reach the room on the 92nd floor. But when he finds the blood in that room, the concept of “minding his own business” is quickly thrown out of the window.
That’s how Tony finds himself trying to befriend the costumed vigilante who comes and goes as he pleases and seems to have a talent for getting stabbed and - wait, how old is he?