Captain Holden is an unrevealed character in Arcane Adventures, though foreshadowed multiple times: through a book, Theos' story at Sunrise Ravine, the Ghost Ship of the Nebula, and his wanted poster.
In Theos' story, it's revealed that Holden was a close companion to Theos. Holden attacked Arcane Government ships on sight as a way to oppose the Arcane Government's laws. Holden owned a grey sailboat named "Nebula" and acted as a scout for Theos in search of Durza, The Dark Wizard. The sailboat was capsized one day by White Eyes and supposedly killing Holden too.
- The capsized sailboat that Holden owned can be seen as a Ghost Ship that roams in the First Sea at night, leading to the location of the wreckage.
- Holden's Power Level is right under Trigno's power level in the First through Third Seas, but above the Kraken's power level.
- In the wanted poster, Captain Holden is wearing his hat.