When you were born your parents found it incredibly hard to decide who would be your godfather, and as a joke, they choose Loki, the god of mischief
When the brother of Thor heard of this, he immediately spat upon it "Pathetic mortals" he said, and since, never really cared

***

It was about 12 years later Loki found himself incredibly bored, so decided to check up on you.
He used his magic to make a small portal deciding it would be to much work to ask Heimdall to send him down, he first opened one into your room and found no one there.
He then peeked into the living room to see a sight that shocked him
There you sat huddled in a corner as your father stood above you with a clenched fist, ready to strike your bloodied and bruised face. Loki decided to intervene
He calmly exited the portal and walked up behind your father
"I believe that is my godchild you are hitting" your father turned around still boiling with anger towards you.
"Who the hell are you?" He asked clearly not remembering the choice he made when you were born
"I am the child's godfather if I heard right 12 years ago"
Your fathers face turned to horror when he finally remembered
In no time your father was lying on the ground to what you hoped was unconscious but there was little hope that was true
Loki then turned to face you
"If I might ask, what exactly is your name?"
" (Y-y/n) you replied, you still did not know who that man was
"It is, an acceptable name," he said as he grabbed your arm and helped you up
He made another portal for the both of you to walk through back to Asgard
"And who are you?" You asked him before entering
"I am Loki, son of Odin, brother of Thor, the god of mischief... your godfather