All children, even genius ones, deserve a friend and when one of Tony Stark’s friends destroys his favorite toy, he decides that the friends he creates are better than the ones he meets. Inspired by his father’s stories about the Howling Commandos, he creates holographic versions of his childhood heroes. As he grows up, peerless and lonely, Tony continues to upgrade his holograms until they become fully-fledged AI, capable of moving around the tower and offering advice and above all, loving him.
This shouldn’t be a problem and it isn’t–until the Avengers move in.
In a world where your soulmate's favorite color appears on your skin when they are injured, Tony Stark is born with grey-- the color that appears when your soulmate is incapacitated or dead-- across his body.
Everyone is born with a mark- unless their soulmate is already dead. What’s unusual is how sometimes Tony has a mark and sometimes he doesn’t.
No one knows what to do with that. Marks only disappear when a person’s soulmate is dead. But one day, Tony had a mark and then the next he didn’t. Tony had barely had enough time to realize that something was wrong before it was back.
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Steve is also born with a mark.
But when Steve is injected with the serum, his mark changes. Marks aren’t supposed to change. They’re supposed to remain static, as static as the fact that the sun rises in the east and sets in the west.
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The Asset doesn't know if he was born with a mark or not.
He would probably say that he was born with one because everyone seems to have one but, if it's not important to his mission, then he doesn't know.
He does have one though. It appears immediately on his metal arm the first time they attach it to his shoulder.
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Everyone is born with a soulmark but some people's marks are faulty.