The Queen of Love and Beauty

Winterfell

Lyanna riding her horse in the godswood "like a northman".

Lyanna is betrothed to Robert Baratheon.

She assumed that Robert will never keep to one bed. She had heard that Robert had a bastard in the Vale. Eddard attempted to persuade her that what Robert did before the betrothal was insignificant and that he would change but she wasn't convinced.

Tourney at Harrenhal

Lyanna finding  Howland Reed being bullied by three young squires.

During the feast, Prince Rhaegar Targaryen, a noted musician, performed a sad and beautiful song that made Lyanna weep. When Benjen teased her for crying she poured wine over his head.

The Knight of the Laughing Tree

The next day, a mystery knight, short of stature, in ill-fitting armor, whose device was a carved white weirwood tree, its features twisted in mirth, fought at the tourney. He defended the honor of Howland Reed by challenging and defeating three knights whose squires had bullied him, demanding that they chastise the squires in order to ransom back their horses and armor.

King Aerys II  Targaryenbecame convinced that the tree on the mystery knight’s shield was laughing at him. Furious, he commanded his own knights to defeat the Knight of the Laughing Tree when the jousts resumed the next morning, so that he might be unmasked and his perfidy exposed for all to see. But the mystery knight vanished during the night, so the King sent his son Rhaegar to search for the knight.