Belphemon - while other demon lords have shown more change or have shown to be better, belphemon is by far the most purified of the demon lords. After the battle between jesmon X and ogudomon X, the village of beginnings was destroyed, meaning that baby digimon were randomly spawning in the digital world, no longer safe from greater threats. After regaining their kingdom, belphemon offered to hold the new village of beginnings within their kingdom, belphemon acting as the caretaker of it. While most of the time he sleeps through his duties, as soon as he senses a threat to his lands, he rushes into combat to fend off the intruders and show them why they shouldnt mess with the strongest (Physically atleast) demon lord.

Leviamon - leviamon....hasnt changed that much. Despite resetting to a more neutral state morally, their own lack of change has ironically made them more envious then the original, not only envying her siblings for their strength, intelligent, and other attributes, but now also for their growth as people, unable to decide whether she wishes to fall back to her ruthless ways like lucemon and barbamon or try to work towards redemption like beelzemon and belphemon. All this uncertainty has left her kingdom in ruins, having some of it overtaken by barbamon for his newest water park and even more territory taken by beelzemon since she doesnt protect her people. Shes even gotten weaker, further feeding into her insecurities...

Deamon - out of all his sibling, deamon is the least changed, his wrath at being defeated, even after fusing with his siblings into ogudomon feeding into his sin. After regaining his old kingdom by slaughtering his former second in command, a venommyotismon, hes searched for any way to once more gain the power of the X-antibody and even further strength. Recently an opportunity has presented just that, as a digimon who claims to be grandracmon's former advisor has given him a proposal he couldnt refuse....

The code needed to produce not only the X-antibody...but even blank digicores, making deamon effectively immortal...

And all they needed in return was to have lucemon and beelzemon killed.

D.R.A lore snippets - the demon lords (part 2)