Kirk
"How can she be with him?" Kirk thinks to himself, "They're complete opposites."
He recalls Uhura's fire. Her quick tongue when deflecting his advances. Her shoves and smacks to get rid of him. She's…fire. His thoughts turn to Spock. His controlled speech. His hands, held loosely behind his back. His body averted to avoid accidental collision with others. He's…ice. Unbidden, an image springs to his mind with crystal clarity. Spock, shoving, pushing, fighting…voice raised, face a mask of rage. Maybe he's fire too…a banked fire that's cool to the touch but heats up when stoked. Perhaps they're not such complete opposites after all.