* ''FanFic/MegaManDefenderOfTheHumanRace'' has so many heartwarming scenes they're called "Defender Moments."
* Rock and Roll's activations; they connect to Dr. Light and each other immediately.
* The Lights learning the "unknown feeling" is love at the end of Episode 1.
* Roll bonding with Doc; he becomes her closest companion and can always find a way to cheer her up.
* After Roll is grounded, Doc helps her feel better by being silly. Later, they bake together, and Doc makes a gingerbread man and then a gingerbread Met.
* Doc saving Roll from Wily at the cost of his own life.
* Rush comforting Roll after Doc's death by sleeping next to her when she goes to bed.
* The flashback to Doc's activation has Roll coaxing him to come out of his hardhat, starting the bond between them.
* Mega Man and [=ProtoMan=]'s conversation in the park in Episode 5.
* Mega and Proto save each other's lives in the climax of Episode 5.
* In Episode 6, Roll reminds Mega that they're a team and he can always talk to her if he needs to.
* A lot of Episode 6's moments with Kalinka and Mega Man, particularly their first kiss.
* Lynn saving her brother, Castor, against all odds.
* [=ProtoMan=] calming down a Met that Wily had tortured and letting it escape with Roll.
* Roll's interactions with Mets, especially Doc and Peekaboo. She also helps reprogram other Mets that Wily had put under his control, restoring their natural programming.
* Roll meeting Captain Fallout and the Atom Smashers, her favorite band, and getting their autographs, sunglasses, and a guitar. Becomes meta when you learn the author based it on the interactions Music/TheProtomen have with fans.
* Roll adopting the Met refugee and naming him Peekaboo.
* Tron's interactions with Servbots, especially her favorite, Number 1.
* [=ProtoMan=] letting Nomad go and lying to Wily about it, saying she was destroyed so he wouldn't look for her.
* [[spoiler: Drill Man's redemption]] in Episode 8. Roll convinces him to not follow Wily's orders, and he listens.
* Roll showing Peekaboo Doc's tree. Boo thanks him for saving Roll, and at that moment a gentle breeze picks up.
* In Episode 9, upon hearing [=ProtoMan=] being attacked by Bass, Mega Man was willing to drop everything to rescue him in spite of everything he'd done. Their conversation immediately beforehand was sweet, too.
** Similarly, [=ProtoMan=] not wanting the police to get slaughtered by Bass.
* Episode 9's initial battle with Galaxy Man has Mega pulling out all the stops to save his family, even at the expense of his own energy.
* The interlude to Episode 10 had Mega and Roll calming down Peekaboo after he was scared of an incoming soccer ball. Roll even pointed out that he made a good goalie.
* Mega Man's preparation for his date with Kalinka in Episode 10.
** In the same chapter, Roll mentioning Doc is an angel watching over them when Kalinka compares Peekaboo to an angel.
* Mega Man's actual date with Kalinka in Episode 10. This includes both of them saying that they like each other for who they are inside; as Mega confesses that he fears Kalinka won't like him after the war with Wily is over, and worries that people see him as only Mega Man and not Rock, she affirms that she always will.
--> Because he trusted her with his feelings, she decided to help make him feel better by making a request. "I know you have to keep armor on, but... please, take off your helmet," she requests.\\
Mega looks surprised at first, but Kalinka explains, "Tonight, you do not have to be Mega Man... we're just two friends named Rock and Kalinka tonight."
** Then they almost kiss.
* Episode 10 has [=ProtoMan=] meeting with Nomad and helping her out; the narration comments that he feels a true sense of purpose for the first time.
** It's doubly heartwarming in that [[spoiler: he entrusted Cut Man, Guts Man, and Magnet Man with the secret]].
* Episode 10 has even more heartwarming with Mega and Kalinka confessing their doubts and insecurities to each other, Kalinka placing flowers at Doc's tree, and Roll being informed of some of the good things [=ProtoMan=]'s done.
* The second conversation between [=ProtoMan=] and Mega Man in Episode 10. Proto comes clean about manipulating Mega, apologizes to him for doing so, and [[spoiler: tells him about Project G-2, the Mega Man Killers' weaknesses, and even offers a tip about Bass]].
* Mega Man and Kalinka's second kiss in Episode 10.
* The climax of Episode 10 has Roll staying home with Peekaboo to ensure he feels protected, trusting Mega Man to save Kalinka.
* In Episode 10, Mega Man and [=ProtoMan=] avoid a conflict to save an innocent girl caught up in the carnage. [[spoiler: It becomes heartbreaking when they later learn she's paralyzed, possibly for life]].
* Even after a direct order from Wily during an interrogation, [=ProtoMan=] refuses to sell Nomad out and avoids mentioning her.
** After [[spoiler:[=ProtoMan=]'s torture]], Guts Man, Cut Man, and Magnet Man carry him back to his bed and try to comfort him.
* Episode 11's first chapter has Mega Man telling Brain Bot of the good Proto did; he recommends Mega talk to him.
* Everyone trying to help Mega out of his depression in the third chapter of Episode 11, and the Robot Master trio trying to comfort [=ProtoMan=].
* Mr. Black remembering [[spoiler: his wife, Tonya]], even if it ends up tragic.
* The fifth chapter of Episode 11 has Bass saving Roll and resisting the urge to just run off with her because it's not what she would want.
* Episode 11, chapter 7 has Roll and Dr. Light reassuring Mega that he's still a hero, and he reflects on those who he's helped and believe in him. [[spoiler: And then the ensuing battle goes horribly wrong]].
* Episode 11, chapter 8. [=ProtoMan=] finds the strength to [[spoiler: redownload his courage and confidence because he knows Nomad needs him]].
* Episode 11, chapter 9, has Roll literally slapping some sense into Mega Man after [[spoiler:he tries to quit fighting Wily]]. Then he reviews the footage and memories of ''all'' of Wily's prior attacks so he has a clearer mindset of what he's fighting against... and the humans he's fighting ''for''.
* Episode 11, chapter 10, has Roll explaining to Boo why she fights, and he understands.
** [=ProtoMan=] [[spoiler:admitting he loves Nomad, calming her destructive programming and lessening her pain]].
* Episode 11, chapter 11, is full of this in the endgame.
** First, there's Mega's concern for his family, the police, and others, letting them get to safety if things become too dangerous.
** Then there's Mr. Black [[spoiler:deciding to not kill Bomb Man, as his true target was Wily, even though Bomb Man caused Tonya's death]].
** Finally, there's the '''big''' moment. [[spoiler:[=ProtoMan=] is forced to kill Mega Man via the Mad Grinder, and seems helpless to do so due to Wily's override command]]. But [[spoiler: memories of his brother, Nomad, and Mega Man never doubting that he loves [=ProtoMan=] enable him to turn his back on Wily, saving his brother's life and the world]].
* Episode 11, chapter 12, has everyone from the Bonnes, the President, Governor Deacon, the New York police, and Kalinka Cossack reacting to the news of Mega's condition.
** It also has [[spoiler: [=ProtoMan=] literally giving Mega Man his heart to help save him]].
** Roll [[spoiler: has her first talk with [=ProtoMan=] as siblings]].
** When Peekaboo comes in to see Roll, [[spoiler: he recognizes [=ProtoMan=] and gives him a big hug. [=ProtoMan=] carries him warmly and with care]]. This makes Roll realize [[spoiler:[=ProtoMan=] ''means'' it about leaving Wily]].
** The chapter ends with happy tears, as [[spoiler:Mega Man wakes up, remembers his family, and gives [=ProtoMan=] a real, brotherly hug]].
* The epilogue to Episode 11 has Peekaboo giving Mega Man a balloon to cheer him up, Mega calling Kalinka to tell her that he's alright, [[spoiler:[=ProtoMan=] having a real talk with Dr. Light]], Dr. Wily ''finally'' regretting some of the things he's done [[spoiler:even if it doesn't last]], and the chapter ends with [=ProtoMan=] and Nomad sharing a happy moment together.
* Part 1 of the interlude to Episode 12 has the entire Thanksgiving scene, where everyone declares thanks for tons of things... and especially for [[spoiler:[=ProtoMan=] coming home]].
* Part 2 of the interlude to Episode 12, has the Christmas scenes. There's Peekaboo's gift from Roll, Mega and Kalinka's scene, and [[spoiler:[=ProtoMan=] and Nomad's first kiss]].
* Episode 12, chapter 4 has a brief scene where Mega Man admires a photograph of Kalinka and remembers good times they shared.
* In Episode 12, Mr. Black makes a vague mention of Nomad, causing [=ProtoMan=] to feel protective towards her.
* The climax of Episode 12 has [[spoiler:Mega Man calling the ambulance to help a possibly fatally-wounded Mr. Black even after the latter betrayed him]].
-->'''Mega Man:''' I promised to defend the human race...even him.
* The Episode 12 epilogue has [[spoiler:everyone celebrating [=ProtoMan's=] birthday]]. the entire sequence is ''made'' of heartwarming, especially with his presents.
** The same chapter has his conversation with Nomad, and he offers to take her sightseeing if possible.
* The Episode 12 epilogue has the final scene, involving Mega Man and Mr. Black. [[spoiler:Barton lives, and Mega Man convinces him to let go of his hatred and desire for revenge and help people. He agrees to, starting with Janet, and admits that thanks to Mega Man, he's changed his views on robots. To fully let go of his quest for revenge, he finishes the chess game he and Tonya were playing before she died--and has her piece win the match.]]
* The Lights deciding to take a vacation in the interlude to Episode 13, with Mega even pulling some strings so Kalinka can come along.
* Episode 13, chapter 1 has Roll and Peekaboo packing for vacation.
** [=ProtoMan=] staying behind at the lab, meaning he can bond with Dr. Light and be with Nomad.
** Proto's goodbye to Peekaboo as they leave.
** Kalinka saying she'd go around the whole planet to see Rock again.
* In Episode 13, Tron smuggles Servbot #1 into Hawaii with her because he wants to be with her.
* Roll wanting Mega to have as much fun as he can while on vacation.
* Mega letting Roll win during a jet ski race; Peekaboo cheers for her.
* Dr. Light and [=ProtoMan=] having a real conversation in Episode 13, chapter 2.
* [=ProtoMan=] seeing the full video of his activation in episode 13 and using the information he learned from it to help Nomad.
* Roll and Peekaboo swimming in a swimming pool together, and Roll talking with Kalinka about how as long as she has family she's fine. Plum also returns, and Roll is happy to see and talk with her.
* Ash Rose being a voice of reason for Captain Tallarico and saying that they can't let their hatred of Wily consume them.
* Roll and Kalinka's concern for Mega Man and Rush in episode 13.
* In episode 13, [=ProtoMan=] and Nomad attempt to spend a normal night out together, with Proto promising to help her in any way he can.
* Bass is so determined to keep Roll safe he tells her Splash Woman's entire plan and how to stop her brainwashing frequency.
* Roll takes Splash Woman's capture of Mega Man and endangerment of Plum personally and is set to defeat her for hurting her family and friends.
* Kalinka refuses to stand by and do nothing when Mega Man is captured, and she helps save Mega and Rush from Splash Woman's control.
* In the Episode 13 epilogue, Mega Man and Kalinka spend time together alone after their ruined vacation, and kiss once more.
* In the Episode 13 epilogue, [[spoiler:Roll meets Nomad and bonds with her, embracing her skeletal hand and reassuring her that things will be okay]].
* In the interlude to Episode 14, Peekaboo asks Roll if Mega and Kalinka will get married one day.
* The interlude to Episode 14 has Roll admit to her family that [[spoiler:she trusts [=ProtoMan=]]], even if she can't tell them the real reason why.
* At the start of Episode 14, Dr. Light realizes he hasn't spent much time with Mega Man and Roll even as their birthdays approach, and resolves to make it up to them.
* Wily taking pride in seeing Bass evenly matched with the Stardroids is strangely heartwarming.