Many of the game's scenes which involve Dizzy and her interaction with other characters.
In GGX, she makes friends with the most unexpected people considering that she is a wanted criminal and a feared command-type Gear. She makes friends with Potemkin, a military man, Ky Kiske, a police officer, and especially, Johnny, a pirate who took her in his group.
In the Drama CD, we learn that Dizzy's wish is to have a friend that will accept her despite what she is. Later when Jose, Dizzy's only friend, apparently abandoned her, Testament gave the words "I'm with you" and told himself that his new purpose in life is to protect her. This is very heartwarming when you connect it to Testament's story which he narrated earlier where he was a kind person who was turned into a killing machine.
In Accent Core, Dizzy and Testament fought over the idea of trusting humans. Realizing that Dizzy is determined to live as a human, he told her never to see him again. Instead of being hurt, Dizzy kindly replied that Testament will one day learn to forgive humans and they will see each other again.
For that matter, in spite of all his aggression and misanthropy, if he beats Kliff in AC+ Arcade Mode his win quote is a meek "Father...I..."
Dizzy's has an ending in Midnight Carnival where Sol calmed her down after she lost control of her power. She woke up crying, feeling warm and comforted and asked herself if Gears like her have parents. Sol watched her from afar.
Johnny's moments with May and the members of his crew, despite the fandom's joke of Johnny being a Lolicon. Johnny as we know it, is a womanizer with dashing looks and sex appeal. But still, he choose to stick with his family, and treasure May the most. It is stated in his profile that his father died from a Gear attack when he was 13, yet still, he looked for Dizzy and happily took her in.
In the Battle of Rome, Ky fought an army of Gears alone with no means of escape to save a person while Sol does the same to rescue him. In the original timeline, Ky dies and Sol cries at his demise. In in the current timeline, where things are better, the young captain (who is in fact dead serious all the time) smiles in relief when Sol arrives.
Ky: Ah, nothing... if you're here, I feel safe.
Venom's and Millia's respective endings in Accent Core where they finally moved on from losing Zato and agreed to stop fighting each other. This is much more poignant because of Venom's love for Zato that is never returned. Despite Millia betraying the man he loved most, Venom, knowing that Millia suffered the same as he, pardoned her crime.
After Millia and Venom's confrontation, we have Eddie, the beast that lives on Zato's corpse, asking Millia to remember him before he dies. Millia agrees and vowed herself to keep on living to carry on the memory of the people she killed.
Venom's 2nd ending shows an alternate scenario where Venom disbands the Guild and lives on as a billiard player. He meets a boy named Eddie who has lost his home. Venom decides to take care of the boy as he is reminds him of his memories with Zato.
The poorly received GG Xtra Manga offers a scene where Ky met Kliff, his idol, for the first time. Ky, who is around 7 years old, runs alone in a snowy town and tells himself that if he doesn't fight he'll just die. When he arrives at where Kliff is, the commander asks if he lost his mother. Ky replies that she's dead and he wants to fight in the war. Kliff tells him that he might got killed, but Ky remains determined; finally, Kliff raised his Dragonslayer on Ky and scares the shit out of him. Kliff explains that he's just a kid but was really impressed. He pats Ky's head and tells him to survive in five years and meet him again. Ky runs off crying with a brave face.
Guilty Gear 2
In Sol's short story, Sin, who is just physically 4 years old gets in between Sol and Ky who are beating each other up. The little child tells Sol to stop because his mother, who is also there, cries when Ky gets hurt. The anti-social and foul- mouthed Sol did stop punching Ky.
Sin's dialogue with Ky at Missions 15 and 16 in Overture. Ky arrives with an army to help Sol and the others defeat the Vizuel Army. Sol left Sin with his father and an awkward meeting follows. After exchange of words, Ky admits to Sin that he wasn't a good father to him and explains his duty as king. Sin was then annoyed at Ky because he's "always right" and asks him why he cares more about other people than his own family, but soon after, the kid promises his father that he'll "save his ass" for his mother's sake. After a father and son tag team versus the lolita army, Ky sends of Sin to follow Sol. Sin hesitates to leave his father in the middle of battle and the two had the following dialogue:
Ky: Now hurry. And son, come back alive for your mother's sake.
Sin: Donít...start acting...like my dad! The old man is my only dad. But at least...now I know that you love Mom. That's why...the same goes for you. If you die and make Mom sad, I'll never forgive you.
Ky: Yes. I promise.
Sin: And one more thing! If you wanna act like a dad, don't talk so formally. Just "hey you" or "what the hell" is fine.
The part where Sol is trapped in the dimension alone and thought of never being able to go back home is a heartwarming scene once you realize that the anti-social Sol considers going home.