Esdeath deciding to hug Seryu when the latter is grieving over Stylish's death. It's our first hint that she has a Hidden Heart of Gold after all. Subverted in the manga version, where Esdeath is just a pure sociopath and later shows that she didn't care about Seryu at all.
In Chapter 14 even though Bulat is dying, he is proud of how much power Tatsumi is capable of using his former Teigu and dies happily knowing Tatsumi will be a worthy successor.
Token Emotionless Girl Akame displays legitimate concern when she's under the impression that Tatsumi's been kidnapped by Esdeath.
Mirrored later with Kurome tending to Wave's injuries following his fight with Shura, the smile on her face with him says how far she has grown to him.
Leone marking Tatsumi as hers by licking his face. Although she has a different way of treating her friends, it's a clear sign that she has a crush on Tatsumi and grew attached to him, despite their rocky meeting earlier in the series. Her love for Tatsumi is demonstrated throughout the rest of the story, reflecting their stronger relationship.
It's easy to forget that Esdeath is a sadistic Blood Knight when she and Tatsumi are marooned on a deserted island. She becomes very sweet and kind, and they work together to hunt for food and survive. She also takes the first opportunity she gets to snatch another kiss from Tatsumi.
When Bors comes across a girl who'd been injured in the crossfire of his battle with Night Raid and kindly offers to treat her wounds. Granted, it ends up being Chelsea who uses the opportunity to kill him, but still.
Chapter 38 Mine managing to defeat Seryu which allowed her to avenge Sheele's death as well as the desecration of Chelsea's body. As Mine was fighting Seryu, Mine's memories of Sheele and Chelsea kept her motivated to keep fighting.
Also, despite her vengeful feelings, Mine tries to get through to Seryu and get her to see reason before the fight, willing to avoid it if she can since Seryu is not a target. Unfortunately, Seryu is too far gone mentally to listen.
Chapter 38 Tatsumi rescuing Mine after her duel with Seryu.
The moments between Mine and Tatsumi in Chapter 39 which showcases how much their relationship has developed from the beginning of the series and her growing feelings toward him.
Chapter 45 when Mine finally confesses her feelings to Tatsumi and kisses him to make her feelings for him clear. They finally become an Official Couple.
Chapter 49 Lubbock coming to Tatsumi and Mine for love advice regarding his feeling for Najenda. Najenda overhears Lubbock and she thinks to herself that while she would not want to get into a relationship before the revolution is over, she might be interested afterwards.
Chapter 50 Mine training with Akame, so she can be ready to help her boyfriend, Tatsumi, fight against Esdeath. The moment Tatsumi and Mine share during this chapter ends with the two of them kissing and Tatsumi admitting to himself that he is falling in love with her.
Kurome and Wave, the former is just unable to hide her feelings for the other...pity the other is just Oblivious to Love.
Chapter 53 Mine openly challenges Esdeath and General Budo to rescue her boyfriend Tatsumi from his public execution, the fact that she's not afraid of provoking Esdeath is nothing short of admirable.
Tatsumi:What a girl...you're more than I deserve.
Mine:I'm taking Tatsumi back, Esdeath!
Chapter 54 Tatsumi manages to make Incursio evolve once more out of his determination of protecting his girlfriend.
Tatsumi:I don't care how agonizing it'll be or how much pain I'll feel, give me all the strength you can give me, because of me Lubo is death, I can't let Mine die because of me too!
Chapter 57 Wave and Kurome has a rather cute scene together when they are talking about Esdeath's wish to fight Tatsumi and the future of the Empire. Wave spent his time during the conversation studying to understand the politics of the Empire in hopes to change the Empire from the within, and to honor the dream's of his fallen comrades, like Bols and Run. Kurome happily encourages Wave and believe that they will succeed.
At the end of their conversation, Kurome decides to take a nap in Wave's room. When Kurome comments that Wave's room reeks of the ocean (and of Wave's scent), Wave comedically mistook the comment as an insult and point out that Kurome could just sleep in her own room. Kurome's response is that she will just deal with it, all the while hugging Wave's pillow.
Chapter 62 & 63 just keep it coming with heartwarming moments between Wave and Kurome. When Akame reveals that she knows about a secret spring that might be able to extend Kurome's lifespan long enough to find a way to break her addiction to her Psycho Serum, Wave declares he'll beat the entire rebel army and take her there himself. He also makes it clear he's willing to go to any lengths to try and keep Kurome and Akame from fighting and killing each other including trying to master two Teigu to get even stronger. Even Esdeath is impressed on some level and agrees to help him.
Chapter 64 has this in spades for Wave and Tatsumi toward Kurome and Akame respectively. Tatsumi goes to speak with Akame saying he'll go with her to her confrontation with Kurome, only to support her desire and not interfere. Following this Akame reveals that just like him, she has a Superpowered Evil Side that will consume her if she uses her Murasame's technique, just like Tatsumi with his Incursio taking over him and they each ask each other to be the one that puts the other down if they succumb.
Meanwhile Wave and Kurome has Wave caring for her until he notices her body is breaking down harder now, Kurome can not think of anything else other than taking on her sister regardless of this, leaving Wave to outright BEG her not to go on this mission, and that he'll do anything to save her. When she refuses and tries to walk out, Wave blocks her, leading to Kurome leaning forward to kiss him....only to punch and wind him enough for her to get past, stating he should not stop her if he is her comrade. Upon leaving however...she dwells on the kiss. This also doubles as a tearjerker.
Chapter 66: Wave manages to stop Akame & Kurome from killing each other and convince the latter to seek help for her drug addiction. The clincher is when he picks her up Bridal Carry style and returns the kiss she gave him in the previous chapter. There's also the reconciliation of the sisters and Akame looks genuinely relieved that she won't have to kill her sister and that she has someone to take care of her. Its positively cavity-inducing, especially given how grim and violent the manga usually is.
Chapter 67: The remaining members of Night Raid reminiscing over their comrades who couldn't make it to the final battle. It was very pleasing to see that long dead characters including fan favorites got a mention before the final battle and Night Raid resolves to make sure that their losses wouldn't be in vain. Similarly, Esdeath being reminded of the good times she had with The Jaegers accompanied by a group shot of with all The Jaegers together. Even though she is a sadistic Social Darwinist, she still valued the time she had with her subordinates and does deeply miss them.
In the last episode of Akame ga Kill! Theater! we actually get to see the members of Night Raid and The Jaegers interacting with each other on friendly terms. Notable examples include Akame, Kurome, and Chelsea dining together, Najenda and Esdeath sharing drinks with each other, and Leone and Run chatting at a bar. However special mention goes to the final scene where we find out that Tatsumi and Mine reunited in the afterlife and spend their time watching over everyone else.
If there's any doubt that Night Raid changed the world for the better in the anime, we get a brief shot of three oddly detailed extras watching the parade after the revolution. These three country girls were the stars of the manga's bonus Chapter 23.5, where they were tortured, mutilated, raped, and eventually murdered or driven to suicide before Night Raid killed those responsible. A trick of fate in the anime had them arriving in the capital after Night Raid's attack, leaving them to actually have a chance to live their lives in a better world.
Chapter 78: At the end of the series, Mine awakens from her coma, and she finds out Tatsumi has been transformed into a dragon. Despite his transformation, she is happy to be with him. Afterwards, they are able to have children and start a family of their own. note They had sex before Tatsumi was transformed.
A small one, but there is a panel showing Esdeath's former soldiers crying next to her grave. As a much of a sociopath Esdeath was, it is heartwarming to see that some people actually grieve for her death.