Izuku was a captain of his ship which he called "Emerald" He was standing in the crows nest, on the look out for anything dangerous, then he saw something under the water, he couldn't make out what it was so he climbed down, and shouted

"Who's there?! We wont hurt you as long as you don't hurt us! Are you okay?!"

His voice was sweet, gentle, and caring. Even though they didn't know the person he still wanted to help out.