Sergio is just a typical guy who likes cute things which contrasts to his more..."Dark" and intimidating appearance. He's usually cold at first since he can be wary of people but eventually warms up to a kind person once you get to know him. Despite his "soft" side, he is still rough around the edges as evident from his build and interest in extreme sports. He has a secret online personality where he roleplays as a cute anime girls, he never does nsfw roleplay because he doesn't like it at all.