VS
When Jon Snow is standing, and you initiate a challenge with another character, is Jon Snow considered an attacking character for the purpose of Ghaston Grey?
I ask this because it says he's considered to be participating, not necessarily that he is also an attacking character. His effect works with the plot Jousting Contest (Each player cannot declare more than 1 character as an attacker or defender in each challenge) because he's not being declared as an attacker, only that he is participating. Can he still be bounced after you win a challenge while he's participating?