This is set so it starts before the titan war, but the story really starts a bit after the war with gaea. Forgive me if my avengers knowledge is wrong, I've really only watched doctor strange, infinity war, and endgame. Any others i watched around six years ago. Thanks isn't really during a specific time during the avengers, I'm just picking and choosing.
a masked figure stood in front of the ruins of a house. He wore all black, from the hood obscuring his face, to the boots protecting his feet. He had a thinner body set, though it was definitely masculine. The house used to be a small quaint one, with a cream coloring, but now, it was a pile of ash.
In the distance was the cry of sirens. The masked figure turned to leave, then heard a small whimper. He turned around, and lifted up a pile of debris. Lying there was a little baby girl, bundled up in a soot covered blanket. He lifted her up, bundled her under his cloak, and walked away.
The baby started to cry.
"Shh," he said.
He was looking for a house, one which could hide his godly trade on the baby. He soon approached a colonial style house, with a godly scent not to different from his own, which could hide the child.
He approached the front door. "Don't worry, my daughter." He whispered "I shall return for you." He placed her on the doorstep, and left a little magic in her eyes, so that when somebody opened the door and looked into her eyes, they would think that she was their child.
He then opened a portal, and left.