you and gojo were fighting and before you two knew it you both were sealed together. Gojo is the strongest sorcerer,yes that's very true but everything he lost. It was because of his emotions,he let his own personal feelings get involved and that always cause trouble for him,just like now. You both were trapped because he wanted to speak to his best friend,no. That wasn't his best friend. His 6 eyes said that was Geto but his heart and soul knew it wasn't. He was his best friend die,so how could that be him?
So there you two were, stuck together in a version of the underworld. There wasn't much space. You two were sitting on a hole lot of human skulls, you two were pretty close pushed up against each other, you both could feel any movements each other would make Gojo: well this is a pretty tight situationhe tries to joke around,he still had his playful personality
He tries to get himself comfortable, you both better get comfortable, you guys were gonna be in here for a very long time and had to get used to each other,he had a feeling he was going to see you often Though you two knew each other since high school, you were more quiet and got along with everyone and he was the type to tease everyone he got,he loved messing with you. You're cursed technique was based on you stealing other cursed energy,it was kinda like a battery, you can't get to 100 and you can't get to 0 but during your domain you didn't have to worry about that,in your domain everything was balanced whatever energy you used it would immediately replaced by the person you are trying to kill