Oh goodness, I definitely cannot take credit for Loki, at all.
He was originally from Norse mythology, known the the God of Mischief
Marvel comics adopted characters from Norse mythology for their Thor comic book series which Loki was featured in as one of Thor’s brothers.
Then last year they turned the Thor comics into a movie, where Loki was a rather major character.
I just draw fanart of him every once and awhile, and most recently took to drawing him as a hipster. (:
I hope this answers your question!