#this took a while to write but 100% represents what my take on an alive!lyanna would do

[lvanna]

         LYANNA’S OPINION ON THE DECISIONS MADE IN 8x03:

          1)  First and foremost, she would side with Sansa during the discussion of whether or not the Northern-Targaryen force should march down to King’s Landing immediately. If I propose a wild maths sum as to how many Bear Islanders we would have left after the Battle of Winterfell, it would likely be around eighteen. Eighteen. Before BotB, the Mormonts have sixty-two men and I say they’d lose around half in that fight. Then, in the BoW, I’d say they’d lose half again  ( if we’re comparing how Grey Worm said half the Unsullied died and Jon noted the same fraction fell of the Northerners. I’m not even going to delve deep into how many Dothraki they lost, but that number must be far, far greater ). Again, with these estimates, I’m being very, very generous. For screentime, we only see five Mormont fighters   —   that’s the minimum and I’d certainly say eighteen is the max. If you think for ONE SECOND that Lyanna would be okay with sending the last remaining Bear Islanders to the south to face a twenty-thousand man Golden Company immediately after fighting the dead then you are definitely mistaken. She’d 100% want to fight the Lannisters at some point, but not days or even weeks after losing that many numbers against the undead army. Sansa here presents the best alternative: wait, regroup, re-train and face Cersei with an equal force and two dragons.

          2) Concerning the Egg-Man Targaryen, if Lyanna finds out   ( or, rather, when because nice try in believing you can keep any secret from this girl for too long )   she would not be happy with supporting Jon as the ‘King in the North’ for very long at all. We know that she is very heavily supportive of a direct Stark bloodline, so finding out he’s a Targaryen would immediately hurt her. Not only was she the first to proclaim him King, but she did that on the very basis that he was Ned Stark’s son in a time when she didn’t know if Bran was still alive. Once this revelation does betray her trust in him as a Stark, you bet she’d drop him and start campaigning for Bran, Sansa or Arya as ruler of an independent North  —  whichever one of them she would see as best fit to rule.  And... let’s be real;   it’d be Sansa. I can see this decision being carried across for a few other Northern leaders, to be honest.

          3) But when it comes to who should sit on the Iron Throne? She wouldn’t be too invested in that seeing as she cares more about the North’s independence. But after the stunt Cersei pulled with Missandei, I think Lyanna would lean a little more into understanding Dany’s reasoning for wanting to quickly retaliate and remove the Lannisters from power. After all, her own family was slaughtered at the Red Wedding by the Lannisters and, truthfully, she can only see Dany being the one to properly attack King’s Landing and serve up some much-needed revenge for the Mormonts. Her conditions for supporting Dany as actually being Queen of the Seven Kingdoms would be under the very specific conditions that she would grant independence to the North with Sansa as Queen — following the reveal of Jon’s identity — and actually wait to attack and formulate a good plan using all the available soldiers and resources she can. Dany can ‘burn them all’, but, please, could she ‘wait for one second, then you can burn them all’.