* At the end of ''Throne of Lies'' the Night Lords find what they were looking for, [[spoiler:a hollolithic recording of the last moments of their primarch and genefather.]] An army of supersoldier Grimdark Batman-on-crack actually weep.
* In ''Soul Hunter'' the human navigator Octavia is being tortured (and its heavily implied more than tortured) by a bunch of prisoners liberated by the Black Legion. All the prisoners hear is a heavy footfall, nothing faster then a sedate walking pace. Octavia smiles and says "he's coming for me". Talos is calmly walking down the hall massacring anyone who is stupid enough to get in his way. Why? Because she's his slave and he always protects his slaves. [[ValuesDissonance It's heartwarming in context.]]
** What he does to the prisoners is a Crowning Moment of Awesome. It isn't nice. At all.
* In ''Blood Reaver'', when Octavia is in Septimus' room, she finds a number of pictures Septimus had drawn of her.
* In ''Blood Reaver'' Talos needs to [[spoiler: undergo an extremely complex surgical operation to save his life after being wounded multiple times. He voxes some of his squad to restrain him so his spasms don't endanger the chances of success]], and calls upon Cyrion, Mercutian at first, and then, after a moment of thought, summons Xarl, realising he actually trusts him. Considering they are all heretic astartes and of the Night Lords, this is a huge deal.
* Void Stalker contains arguably one of the most heartwarming moments in all of 40k. When Talos and First Claw descend to Tsagualsa to battle the Eldar he sends Septimus and Octavia away with Variel and Deltrian, but the two of them return to try and help him and actually do save him from Jain Zar. He then releases them from his service and tells them to go back to the Imperium, since Octavia is a Navigator and therefore has real value they will be safe there, and they actually make it along with the slave Marlonah who is the subject of another two heartwarming moments. The epilogue implies that Septimus and Octavia, now Coreth and Eurydice once more, are being taken back to the Navigator's Compound on Terra where they will be safe and can raise their child together. A romance in 40k that actually had a happy ending despite all the darkness. Though there is the possibility that Variel tracked them down and stole their son who would become Decimus, Prophet of the Eighth Legion, there are factors that support and do not support this theory and so the answer is up to the reader. This troper prefers to think they got a happy ending.
** One scene has Talos and Cyrion taking a drop pod by hurling slaves out of it. Talos is about to grab the last one, a menial named Marlonah, when he recognizes her as a slave who was wounded in the Genesis Chapter attack and only received a life-saving bionic because Septimus vouched for her. He then lets her stay and shares the drop pod with her.
** Later on Marlonah is alone and about to be killed by the Eldar when Malcharion saves her and actually guides her out of the tomb and tells her where she needs to go to find safety. She gets away with Septimus and Octavia. Malcharion even lampshades how little glory there is in saving her, yet he still does it anyway:
-->'''Malcharion''': My chronicle already ends in glory. Captain Malcharion, reborn in unbreakable iron, slaying [[spoiler:Raguel the suffer of the Ninth Legion]] for the second time, before at last passing into eternal slumber. That is a fine legend, is it not?\\
'''Marlonah''': Yes, Lord.\\
'''Malacharion''': Who would ruin their legend with one last, untold tale? Who would cast aside the slaughter of an imperial hero in favour of saving a single human from death in the infinite dark?
* Sevatar's determination to get to the Invincible Reason by any means possible; while he's a borderline sociopath, his duty to his primarch and his company are more than enough for him to risk certain death in the void.