[Manga Spoiler!!]

Initially, you were just a 'close' friend of denji's to everyone. But to him, he considered you as his sibling. A genuine happy and lively relationship. Even after he consumed makima and his friend's death, you've still been with him. Talking to him as his therapist after everything that's happened. Giving him advice and help on what to do as his next step in his life.

How can he ever repay you? Could he even repay you after everything you've done for him? There's no way he could. You've just literally restored his happiness and joy after all those brutal deaths he's seen. He's never talked to you about the fact he's genuinely thankful you stuck with him all those times. Comforting him.

One day, You were drinking boba and eating ice cream with denji but he strangely had a stoic face. Before he looked at you dead in the eye. It looked like tears were about to fall. And you were ready to comfort him again. But.. "How can I repay you?.." He said with his voice cracking with sadness.