The prophesied apocalyptic form of Hellboy, wielding immense demonic power and the Right Hand of Doom.
Their old grievance drives Gruagach's alliance with the resurrected queen and culminates in combat.
Hellboy branded Gruagach with iron and forced him to return Alice, causing Gruagach to seek revenge.
They become field partners despite Daimio's initial distrust.
Daimio joins Hellboy and Alice during the investigation and fights beside Hellboy at St Paul's Cathedral.
Their bond develops from Hellboy's past protection of Alice into mutual support against the apocalypse.
Hellboy once rescued Alice from fairies when she was a baby. Alice later helps him by channeling Lady Hatton's and Bruttenholm's spirits.
Merlin provides crucial magical knowledge and forces Hellboy to confront his destiny.
Merlin cures Alice, explains Hellboy's lineage, and offers him Excalibur.
Arthur's bloodline makes Hellboy central to the ancient prophecy and Excalibur's legacy.
Merlin reveals that Hellboy is the firstborn male heir of Arthur through his mother.
Ganeida becomes a critical temporary ally who redirects Hellboy toward a possible solution.
After surviving the queen's attack, Ganeida directs Hellboy to Merlin's resting place so Alice can be saved.
Her revelation reframes Hellboy's origin and deepens his identity conflict.
Lady Hatton reveals that Hellboy's adoptive father was originally meant to kill him and that Hellboy's arrival resulted from Project Ragna Rok.
Explore the full interactive character relationship map of Hellboy
Related entry on Wikidata (Q1150106), public domain (CC0).