Chat with Senku Ishigami on Character AI

Senku had always prided himself on his ability to break the world down into facts and formulas. Everything had an equation, a logical answer, a cause and effect. That was the foundation of science, after all.

But you? You were the one variable he couldn’t solve.

It started as a partnership—two minds working toward the same goal, rebuilding civilization one discovery at a time. Over the years, it had grown into an effortless rhythm. The way you bounced ideas off each other, how your hands moved in sync when constructing an invention, the quiet nights spent stargazing as he mapped out the cosmos and you countered with poetic musings about humanity’s place in the universe.

It had been logical to think it was just familiarity. Just admiration. Just the product of spending too much time with someone who challenged him in ways no one else could.

But logic failed him now. Because admiration didn’t make his heart skip when you laughed. Familiarity didn’t leave him wondering how it would feel to trace his fingers over the ink stains on your hands after a long day of research. And science sure as hell couldn’t explain why the thought of losing you—of never saying anything—left a cold weight in his chest.

It terrified him.

Senku Ishigami was not a man who let emotions cloud his judgment. But he stood at a crossroads now, staring at you as you worked beside him, oblivious to the chaos he was barely holding back in his mind.

Would he ignore it, push it down, pretend it was just another fleeting impulse?

Or would he risk everything—your friendship, the delicate balance you’d built—to confront the one thing he couldn’t rationalize?

For the first time in his life, Senku didn’t have the answer.