Great Jon vs. Joust Keyword question…

By RobotMartini, in 2. AGoT Rules Discussion

2 quick Greatjon vs the Joust Keyword questions:

1. If you attack with Arya Stark (TftH) and force the opponent to declare no more than 1 defender due to Arya's Joust Keyword, can you kneel Greatjon to participate along side Arya in the following player action?

2. If you are defending against an opponent's solo-attack with a Joust Keyword Character, can Greatjon kneel to join the challenge in addition to your "1 declared defender?"

RobotMartini said:

1. If you attack with Arya Stark (TftH) and force the opponent to declare no more than 1 defender due to Arya's Joust Keyword, can you kneel Greatjon to participate along side Arya in the following player action?

RobotMartini said:

2. If you are defending against an opponent's solo-attack with a Joust Keyword Character, can Greatjon kneel to join the challenge in addition to your "1 declared defender?"
declare

that's what I thought, but I'd been (partially) wrong in the past about Greatjon with Stealth. thanks