What CR is Jaina Proudmoore?

Her native build is CR 11 (Tier 3, levels 11-15) and she is solo-capable as a centerpiece boss thanks to her legendary actions and Flash Frost reaction. Scaled stat lines for Tier 1 (levels 1-4) and Tier 2 (levels 5-10) are provided so she can headline lower-level tables; the traits and tactics stay identical, only the numbers move.

Can Jaina Proudmoore be a companion or ally?

Yes. As an ally she is a battlefield-control caster who walls the party off from danger and slows incoming threats, while her bound ice serpent Rimewing grants nearby allies cold resistance and shields them from hits. At lower tiers, lean on the Tier 1 or Tier 2 numbers so she never outshines the player characters.

Is this miniature based on a copyrighted character?

No. This stat record is reframed as a public-domain Frost Magus, an archetype drawn from world folklore of winter spirits and ice-witches, with no proprietary names, places, or lore. Use her freely as a generic human ice-themed sorceress in any SRD 5.1-compatible game.