Queenly Majesty prevents Tsareena from being targeted/attacked by priority moves. Does this apply to the secondary affects from moves like Baneful Bunker, Obstruct, or Spiky Shield?
No, Queenly Majesty does not prevent the effects of Baneful Bunker/Spiky Shield/Obstruct. I tested the interactions of Queenly Majesty and Baneful Bunker/Spiky Shield/Obstruct in this test replay. The secondary effects of those protection moves affected Tsareena. I even tested this interaction in-game, and Tsareena still gets affected by the secondary effects of protection moves such as Baneful Bunker.