Heartwarming / Disgaea 4: A Promise Unforgotten

• Valvatorez' "pep talk" to Desco at the end of Chapter 3. Desco's just been beaten and the veneer of last-boss-ness she was putting on has been stripped away completely, leaving behind the truth of a sad little girl who was abandoned by the person she loved, and now she's afraid she'll never measure up or be welcomed by anyone. Val's reassurance to her that she can be a final boss and his promise to her to make her into a magnificent final boss is the perfect mix of heartwarming and bizarre that you only find in Disgaea.
• The normal ending when Valvatorez tells Nemo, who believed he was beyond forgiveness, to become a Prinny and earn his forgiveness rather than giving up his soul. Because he is the Prinny Instructor, Valvatorez says he will personally ensure that he will work to pay off his sins. Finally, there's Valvatorez's last line which ends up being used in a more uplifting and heartwarming way compared to its usual application:
  Valvatorez: Judge Nemo, I'll see you in Hades.
  • Also from the ending, everyone encouraging Emizel to reap his first soul.
  Emizel: In the name of Death Emizel, I hereby sunder thy soul from this life.
• Fuka realizing that despite feeling that she had been neglected, her dad truly loved her. That he didn't become a mad scientist out of remorse for his late wife but to fulfill the wishes of her daughter and created Desco and Des X because Fuka really wanted a sister. ...then she hits him for making her really strange sisters.
  • This is even lampshaded by the other characters as being heartwarming... in their own way, of course. In fact, the only character who doesn't find this scene in some way pleasant is Nemo, who has just begun to flip his shit as a result. Even Des X is done with killing Fuka.
• The growing sisterly bond between Fuka and Desco, especially during the Fuka and Desco Show. Of particular note, Fuka telling Torn Desco that regardless of how unshakable the rules of reincarnation are, she will not let it take away her memories of her precious baby sister and all her friends.
  • Fuka's Big Sister Instinct when Mao gets a little too interested in researching Desco. Fuka ultimately hits him out of the map for trying to lay a hand on her little sister. Compare this to how she reacted to Desco when they first met.
• The Vulcanus aka Artina ending. She talks with Val, and after the usual Snark-to-Snark Combat, finds that Val still won't drink her blood because of his promise. Her response? He can, because she was so scared of losing him to the malice.
• The aftermath of the Zetta fight in the post-game. After winning, Valvatorez says that he could not have won on his own and takes a moment to single out each member of the party and list their contributions to the team.
  • Conversely, Zetta shows how much he's matured since Makai Kingdom by taking his defeat in stride and delights in having a new rival to challenge.
• The Netherbattle Tournament finally throwing Prism Red a bone by having Nisa become his first legitimate friend. That squeal of delight he lets out can easily bring Tears of Joy to even the coldest of hearts.
• ANY of the character-specific epilogues count, as it really hits home just how great a leader and mentor Valvatorez is to his party.
• The recruitment scene for Pink, Axel's biggest fan. After a whole game of Axel playing the Butt-Monkey, it's nice to see someone who truly cares about him. Even Fenrich seems somewhat touched by her display of affection.
• The Prinnies Valvatorez trains worship him so strongly that the mere thought of him is enough to motivate a discouraged, ignored Prinny to become a Senator.