I have given this quite a lot of thought and have come up with a system I am rather happy with. I would like your comments on the balance issues: are the effects strong enough, or too strong?
Knight Errant: Basic, Combat, Noble, Devoted
Skills: Weapon Skill, Athletics, Leadership, Piety, Ride,
Advances: same as Knight
Stance meter: Cons. x1 and Reckless x 3
Talents: Reputation x 1 and Tactics x 1
Career ability: You may purchase Gifts of the Lady as Talents, and may slot one gift in one of your talent slots. Also you gain for free the Blessing of the Lady action card.
Gifts: Each gift requires the expenditure of a fortune point at the beginning of the player's turn, lasts for the rest of the encounter or until the gift is unslotted, and only one may be active at a time.
Valiant heart: +2 fortune dice to all Fear and Terror checks.
Aegis of light: +2 misfortune dice to all negative/offensive spells against the knight.
Grail Chalice: +2 fortune die to all checks to resist poison. Cancels poison attacks that don't cause a check to be made.
Nimbus of the Lady: +1 Defense.
Pure soul: +1 boon to all melee attacks performed by the knight.
Blessing of the Lady: Action card, same stats in Conservative and Reckless.
Difficulty: 2 Purple
Requirements: Must be able to loudly call on the Lady by performing at least a maneuver. The longer the praying the easier the check.
Recharge: Special. Praying for 1 hour or more recharges the card.
1 success: Regain 1 fortune point
3 successes: Refresh your fortune pool
2 boons: gain the Inspired condition with three recharge counters.
Sigmar's comet: This action recharges immediately.
Chaos Star: The Lady is displeased by your actions and you lose 1 fortune.
2 Chaos Stars: The Lady is displeased and you may not use Gifts in the next encounter.