Perhaps your headcannons for the 7 Death Generals? Your writings with Spashmon have really made me interested in these dudes! (Maybe throw in an s/o for each of the Generals just to mix things up SKDIFJDJSJ)
Really, Olegmon isn't really big in the Death General thing, but he'll do it because he didn't se a better option. And he can be pretty damn good at it, being a pirate as he is and with the ability to put Digimon under a spell that makes them join his crew.
Olegmon has a heart of gold despite his stance as a Death General, though. And when it comes to having an S/O, he's the sweetest pirate there ever could be towards them. He's kind, and he's gentle, and he can't help but to compliment his S/O any time he sees them -- which is often if they're on his ship a good part of the time. So Olegmon practically showers his S/O in compliments, just to see them smile.
Dorbickmon is a prideful dragon. To wound his ego means extreme pain and torture from the Death General, and he'll laugh the whole time. He's highly aggressive, and looks to start fights constantly, especially those who try to challenge his prideful ways.
With an S/O, he's still rather aggressive towards everything else. However, when it comes to his S/O, he's extrmely protective of them and has pride when it comes to them. So any who say anything about his S/O are technically saying it about him, and he won't stand for it. His S/O might need to help him on his 'anger issues' a little if they don't want him just attacking everyone who says something the wrong way towards them.
Apollomon/Apollomon Whispered
Apollomon isn't a bad Digimon. Not in the slightest. He pulls it over well enough, though, and he's truly a sweetheart behind his seemingly menacing exterior. He uses it to keep himself decent. At least, until Apollomon Whispered shows up and pulls it over on him.
Apollomon Whispered does keep his soft side, but only towards an S/O that he decided was his out of nowhere unless they approached him the first time they saw him. He acts like how Apollomon would towards them, but everyone else faces his wrath if they say anything in the slightest about him.
Small, but still rather deadly. He's got a sweet-tooth to him, and he can't resist some nice DigiHoney, even if it made him shrink quite a lot. Really, he just couldn't help himself.
Zamielmon with an S/O is actually a big lovable dork. He dotes on his S/O quite a lot actually, and adores them to the point others would doubt that he's actually as big and bad of a Death General as he's supposed to be. But with a sharp sniper shot, it's easy to remember that he isn't as soft as he is when he's around his S/O. Zamielmon just can't help himself around his S/O, he loves them dearly and has to show it, even in-front of his soldiers. He isn't afraid to do it, just because he knows that THEY know he's incredibly dangerous.
Splashmon hates working with others, that much is obvious. He has his own little world of trust issues, even when it comes to the other Death Generals he's much rather be by himself than talk to any of them, even if they try to initiate things with him. He has his own job to do, and he's the best at it -- so he claims.
When it comes to having an S/O, it's the ONLY person that Splashmon would ever trust that isn't something he created. He's awkward when showing affection, actually, and so his S/O may need to help him at first since he's still a bit on edge over it all. Splashmon does eventually start to dote upon his S/O, it just takes him some time to really get used to having someone else he can trust around...
Gravimon is a seeker of knowledge. Although, the type he seeks is more for his tactics in battle. He's always finding new ways to change the battlefield and put it into his favor, as he is quite a brilliant mind, and as such, he always seeks new and interesting ways to "liven up" fights.
With an S/O, they best be prepared for this large, skinny Digimon to chat their ear off and delve into deep conversation back and forth with him. Of course, they also best be prepared for him to tease them as well,
NeoMyotismon is cruel, there's no doubt about it. He enjoys crushing hope where there may be any, as he enjoys seeing the looks on faces drain from hopeful to despair. It amuses him greatly before he decides if they're better for a meal, or if he should leave them be after filing them with such a despair... of course, suffering morsels always taste better.
NeoMyotismon with an S/O isn't all too different. He needs a bit of help on grasping emotions, as while he does have an almost gentlemanly demeanor, he is quite aggressive and mean -- and is blunt also. But, he hides away some of his actions from his S/O. He also enjoys teasing his S/O quite often, it amuses him greatly to see their flustered face when he says what he thinks to them