The Heroes of Olympus/Heartwarming


 * Jason  after they'd been separated for years. Bittersweet, though, in that he also finds out some pretty hard things about.
 * Percy telling Frank.
 * Grandmother Zhang telling Frank that she's proud of him.
 * YMMV, but basically anytime.
 * Annabeth was hit pretty hard by Percy's disappearance, especially so soon after they'd finally gotten together. Piper being so sure that she and Jason were boyfriend and girlfriend probably didn't help. Then, mere pages into Son of Neptune, we find out that
 * Percy giving up  for the chance to find Annabeth.
 * Heck, any time Percy mentions Annabeth is undeniably heartwarming!
 * Percy wanting to protect  partly because he wanted a life for him and Annabeth there.
 * Hazel recalling the best day of her life.
 * Percy's reaction to at the end of Son of Neptune.
 * Percy's reaction to at the end of Son of Neptune.