The High Prince of Winter and master of Castletree, who appears as a harsh and formidable figure but holds a deep protective instinct beneath his icy demeanor.

The High Prince of Summer, known for his carefree and charismatic personality, who uses humor and hedonism to mask deeper loyalties and complexities.

The High Prince of Autumn, a gentle and intellectual fae whose scholarly nature contrasts with the uncontrollable beast he becomes at night.

The High Prince of Spring, an enigmatic and dutiful protector who balances ferocious strength with a compassionate moral compass.

A significant minor antagonist from Rosalina’s past, representing toxic control and contributing to her desire for freedom.

The primary antagonist, a manipulative fae lord whose power threatens Castletree and who harbors a personal vendetta against Keldarion.

A loyal and kind servant of Castletree, serving as a confidante to Rosalina and providing key information about the fae realm.

A lively and humorous member of the kitchen staff at Castletree, who offers Rosalina warmth and maternal support.