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Pairing: Balthazar/Castiel
Alternative name(s): Calthazar
Gender category: Slash
Fandom: Supernatural
Canonical?: No
Prevalence: Rare
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Balthazar/Castiel, also known as Calthazar, is the slash pairing of the angels Castiel and Balthazar in Supernatural fandom.


Castiel and Balthazar are friends and "brother" angels pre-canon. Balthazar is introduced in season 6, where he is shown as a hedonistic angel, however, he does side with Cas in his war against the archangel Raphael. In the later half of the season Sam and Dean are concerned with Cas' actions, which are growing increasingly power hungry and paranoid, and requests Balthazar's help, Balthazar agrees to spy on Cas for them. Unfortunately, Cas discovers Balthazar's duplicity, and kills him.


Common Tropes in Fanworks

  • Angelcest: this pairing is sometimes considered incest because in canon the angels call each other brother (or sister)
  • Pre-canon: focusing on their relationship before we meet them in canon, their friendship and if it was more
  • All Human AU: where they are turned into humans, or mundane AUs where they were always human
  • Balthazar Lives: Castiel doesn't kill Balthazar in season 6, or Balthazar is somehow resurrected. There is also some exploration of Cas' guilt and angst over killing Balthazar
  • Past Relationship: sometimes characterized as a past relationship before the Dean/Castiel pairing happens



Art by 365wyrms for the fic Wartime Wings Beloved, as part of the 2013 Angelcest Big Bang

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