Heartwarming / The Olympians

• The ending to Hades: Lord of the Dead:
  And perhaps the biggest change of all: In the center of the Underworld, atop his throne of ebon, is its lord. Who has many names, but is best known by the name he shares with his realm, Hades. Gloomy still, yes, but now with the touch of a smile playing on his lips. If you're lucky, when you die and you come before him, it will be during that portion of the year when, seated beside him on a throne of iron, is his queen. Persephone.
  • What makes the above even more heartwarming? The color of the narration text box changes to the same shade of purple as Persephone's dress. The narrator of that last sequence is likely Persephone herself.
  • Before that part, we also have Persephone helping Hades reform the Underworld; before her, the souls in the Underworld had nowhere to go and had to simply stand around and wait. Persephone helps give them a better afterlife, allowing them to return to the living world, born again into another life, and when they're reborn enough times, they'll be allowed into the once empty fields of Elysium to spend the rest of eternity in blissful paradise.
• Despite a small amount of Bowdlerization across the series, Ares: Bringer of War doesn't shy away from at least implying Achilles and Patroclus were lovers—despite his role being limited, Patroclus is explicitly described as "beloved of Achilles" and Achilles' grief very much feels like that of someone who had lost a romantic partner, complete with full-on Berserker Tears. Doubles as a tearjerker.
  • Similarly, Apollo and Hyacinthus are pretty much outright depicted as a couple.
• Leto's speech to Artemis after the latter's friendship with Orion goes sour.
  Artemis: Mother... you never took another lover after Zeus. Why?
  Leto: Love... is a funny thing, my daughter. Sometimes it hurts. Sometimes you give it to the wrong person. Sometimes you share a love with someone, even someone who is as big an idiot as your father, and for that time, that love is the greatest thing. And sometimes, that's enough. I thought my love was sated, daughter, until I met you.
• Hephaistos being Happily Adopted by Thetis and Eurynome.
• Pan's birth in Hermes: Tales of the Trickster. Though Pan's inhuman appearance frightens away the midwife, his parents, Hermes and Penelope, love him all the same and Hermes finds Pan's strange looks so cool he immediately takes him to Olympus to show him off. The Olympians end up adoring him too, his name becoming "Pan" (meaning "all"), because he's beloved by all the Olympians. As an adult, he strikes up a friendship with Dionysos due to their shared status as outcasts among humans.
• From Dionysos: The New God, we have the reveal as to the true reason Hestia took on her fiery form—she wanted to warm and protect her siblings while they were imprisoned in their father's stomach.