Heartwarming / Ghosts and Dreams

• The fact that both Lyanna and Elia consider all three of Rhaegar's children theirs despite of who birthed them and love them equally, with not even the smallest hint of Parental Favouritism. In a wretched world like Westeros where people put far too much stock to bloodlines it is awe inspiring.
• Brandon Stark led the defense of toddler Aegon against the ghost of Mad Aerys. Aegon is not related to him, and is ahead of his blood nephew for the Iron Throne. Your average Westerosi nobleman would have let Aegon die, Brandon chose to save him, despite what the kid's grandfather did to him.
• Rickard did the same to protect Jaehaerys and Rhaella from Aerys. Jaehaerys is his own grandson, but in defending Rhaella, the wife and sister of the man that murdered him and his son he proved himself to truly be the father of Lyanna and Ned.
• Lyarra accepting that her daughter is more enammoured with her sister wife Elia rather than her husband Rhaegar without as much as batting an eyelash. Lyarra has her faults but she loves her children and grandchildren dearly.
• Rhaenys, a four year old girl that suffered a horrible, traumatic death guarded her baby brother Jae with her cat, very shortly after her death. Most children, especially ones from feudal societies would have likely disliked and blamed the new baby half brather, and even blamed them for their deaths. As far as Jae can remember, Rhaenys has been with him, a cheerful, loving, protective figure.
• Robb's POV, he dearly loves Jaehaerys, vows to keep him with him in Winterfell no matter what, and is devastated when he finds out about Jae's true identity.
• Rhaenys gets Balerion to be kind to Arya and console her after Sansa and Jeyne upset her.
• Ned allowing Arya to take up archery, encouraging her gift instead of suppressing it.
• Apart from Sansa, all of the Stark children love Jae and enjoy spending time with him.