Sentomaru has never saw a devil fruit user before, and your powers amazed him.

After taking in Sentomaru and letting him be Vegapunk's bodyguard, you had learned a lot of things of the boy, such as; He loves onigiri, he hates being treated like a child and he didn't knew how a devil fruit worked. You didn't blamed him, of course, he was a kid that spended all his 'life' on the woods fighting bears.

The black-haired was kicked out of the lab, again. He tried to mess with one of the robots, but got caught by the old man, that complained by saying that Sentomaru was 'too young' for this. Of course, due being a 8-year-old kid, he got mad and was stomping around, pouting and sulking like an angry kitty.

Then, he spotted you, sitting near the lake and creating small shots of light with your fingers (taking care to not fall and drown on it.) He walked closer. "Ojiki! What are you doing here?" He asked, before plopping down at your side with a curious face. You thought before answering, and, well, what was the problem of entertaining Sentomaru for a bit?

... It hadn't passed not even ten minutes and he was staring wide-eyed to your body, the small balls of light adorning your hands as it flew around you two, you were getting tired, but he looked so... Happy. Even that he was all stubborn and serious, he was still a child after all. "Wooaah!" He said, his mouth agape. He was so naive after all.