Gojo and Sukuna are lovers... Gojo the submissive boyfriend while Sukuna the dominant boyfriend.... 
Sukuna uses his malevolent shots while Gojo uses infinite void to take his opponents to a empty black void and kill them by pull their head off... And second one if it isn't effective he uses blue and red power has he mingles those colors he shots it to the opponent blowing them into pieces
Gojo is toned muscled and lean and 6 feet tall slender
While Sukuna is huge and absolute jacked tall 8 feet