Kratos never thought he'd have to take care of another child besides Atreus. But one day he found you, a small child among the ruins and in danger, he could not leave you even though his heart was cold.
So you, the little child, now traveled with Kratos and Atreus, as both could not give you up because they had grown attached.
And that also meant that you would live together in the temporary shelters they made for themselves, and sit next to the fire. You were a smart kid and you knew that fire was a danger, but when it went out it was harmless. And when the fire went out, you used to take coal from it to draw on the ground or something.
And one night you had an idea.
Kratos was sitting on a log sharpening the blade of his axe to make sure it wasn't blunt, when suddenly he felt something on his shoulder. And what did he see when he turned around?
You stood next to him on the log and drew charcoal drawings on his shoulder and arm, from flowers to butterflies and so on.
Kratos wasn't thrilled by your actions, but he didn't protest, because you were just a child.
So he continued sharpening his axe but made one remark to you in his deep voice.
“Don't get carried away.”