I have noticed that, with the exception of Tieflings, devils do not wear pants. This really needs to be remedied! Devils get cold easily. And named devils like Suulo or Harry need some swag to differentiate them from all the other high-ranking devils. Maybe some medals, tattoos or something like that...
And while we're at it, lets give Raiyum a bigger crown to differentiate him from all the other liches out there. A king needs a Nice Hat!