Thor

Thor is the Norse god of thunder and a member of the Aesir tribe of Norse gods. He is also the father of Gunilla.

The Sword of Summer
Thor sends Magnus Chase and his friends on a quest to find his "not officially missing" hammer Mjølnir.

Trivia

 * Thor's Greco-Roman counterpart (in terms of abilities) is Zeus/Jupiter.
 * Thor watches a lot of Midgard (Human) television. Some shows he watches are Arrow, Breaking Bad, Game of Thrones, and The Walking Dead.
 * Thor has lost his hammer Mjølnir three times.
 * Modern popular culture erroneously depicts Thor with blond hair.
 * During the events of Ragnarök, Thor to kill Jormungand, the World Serpent, but to be slain himself by Jormungand's venom as it dies.