Mr. Fierro

Mr. Fierro  is the father of Alex Fierro and a lover of Loki.

History
Mr. Fierro was married to an unnamed woman when Loki seduced him in the masquerade of a red haired woman. Nine months later his lover returned with a child. She told him that she was really a Norse god and opened him up to the Nine Worlds. He and his wife were never the same after that and they resented Alex for that. He would berate her for her heritage and being genderfluid until Alex was kicked out and forced to live on the streets.

The Hammer of Thor
Alex mentions her father when explaining what life was like for her. When Alex and Magnus Chase are trying to break an illusion during a bowling game against giants, Magnus sees a memory of Alex's father yelling at her to get out and stay out.

Appearance
Mr. Fierro is described as a man with dark hair and wearing tennis clothes.

Personality
Mr. Fierro is not very faithful, as he had cheated on his wife with another woman. He was also cruel as he berated and disowned his own child for an act he and his lover committed.

Mrs. Fierro
Despite being married to her, he cheated on her with a woman who later revealed that she was really Loki in disguise.

Alex Fierro
Mr. Fierro hated his child for being gender fluid and a demigod. He would berate and abuse her for what her biological mother did to him.

Loki
While Mr. Fierro was at first attracted to the trickster while he was disguised as a woman to the point of cheating on his wife, he was shocked and revolted by the revelation that she was really a Norse deity and told them about the Nine Worlds. The shock would turn to hatred which he would take out on his child.

Trivia

 * Mr. Fierro is the only known mortal within any series to have a demigod child through an affair, when normally it is the god who has a child through this relationship ship.
 * He plays tennis.