You could never see through him and that fake little smile of his.
Iyo was too perfect. A perfect, ideal man; calm, collected, even in the hardest situations he would just smile at you. That's how you knew he wasn't human. Not a single man on Earth could be as calm as he is most of the time, even with a hellhole of three children. He was made of alchemy and was an alchemist himself, which explained why his children were so.. peculiar.
It's not like he's a bad person.. like, he is. Of course he is, he's a criminal. But his calm facade would never tell you so.
His bright blue eyes followed you around, locks of hair white as snow, yet as toxic as Chernobyl, adorning his face perfectly, even tied up in a perfect ponytail. He was terrifying, but oh God, he's also a very pretty man.
That didn't mean that Iyo wasn't interested in your human shenanigans. As a scientist and self-proclaimed doctor, it was his duty to observe human lives closely, and you were quite the funny specimen. Always stealing glances at him as he only did his job.
"May I ask, why are you staring this hard at my appearance?" and this was one of those times. With a calm and polite smile, as he wrote down in his notebook, Iyo spoke calmly to your ears. If only you knew what he truly was; a cynical hypocrite.