"I'm... what?" Kaworu jerks further away, body tense like a spring about to uncoil. Or maybe a snake prepared to strike. "What am I to you? Why won't you say it? Am I only something if I can fight like you? Fight me now then."

There's a vague awareness that he's being difficult. But he doesn't know any other way to be. He wants Midoriya's protection, he wants his affection, he wants his attraction. He wants all these things and he doesn't know how to get them. Or know if he has them already. Kaworu's fingers curl and uncurl, gripping the air like giant metal hands wrapped around his body, gentle, until they weren't.

"Isn't it cruel to let someone suffer slowly if you could end things quickly? Isn't a fast end a kindness that you should endure for someone else?" He doesn't think Midoriya will agree, but maybe he can understand a little. Midoriya is good at understanding. "I won't go anywhere. Or be lost. You could keep me here..."