The Queen the female half of the current rulers of a Kingdom. The Queen and King acting together are referred to as the Crown.
The Queen may gain her position through right of arms, or by being consort to the King. She is addressed as Your Majesty, and referred to as Her (Royal) Majesty.
When a Queen steps down, she becomes a Countess (or some variant appropriate to her persona) if she has reigned once and also becomes a Lady of the Rose. If she has reigned twice, she becomes a Duchess (or variant).
The Queen of Lochac, whether she is Queen Regnant or Queen Consort, uses the undifferenced Arms of the Kingdom of Lochac.