Title: Expressive
Summary: Kaito's eyes slowly change over time.
A/N: Spoilers for season 6
His eyes used to be wide, soft. A welcoming light blue-gray. They shone with pride and happiness as he swung Haruto on the swing and built Orbital. His eyes shone in awe as his father gave him "Feelings Towards the Future."
And when Haruto was taken away, when he lost all what he had known, those blue-gray eyes hardened into a steely gray jail, covering up his emotions, his weaknesses.
Kaito's eyes never lost that steely gray color, and as he focused more on hunting Numbers, they darkened more and more until they became stormy - must continue hunting Numbers must continue can't stop - reflecting the pain he felt and they ached, ached and ached until Kaito turned off Photon Mode.
Oh, there were people that made his eyes light up, Chris with his warm words and fierce training - until he shoved Kaito into a puddle and left him to Heartland, Droite, who looked out for him and he never expressed any words of thanks, and now Yuma, with his bright cheerful smile, the same one that helped free Haruto, helped free Kaito from his Numbers hunting and brought everyone back together.
When Kaito met Mizael, his eyes glowed brighter, in anticipation for the duel that would happen, ready to defend Yuma but also very enthralled by finding another Galaxy Eyes user, a rival.
And on the moon, Kaito's eyes had become more relaxed as the last of his vision faded, and he closed his silver - deadly and yet so very expressive - eyes for the final time.
If you asked people what was most memorable about Kaito, it wouldn't be his hair, or his white coat, or even his tendency to yell "HARUTOOOOOOO."
It was his eyes, the ones that expressed Kaito's emotions the most when his actions and mouth didn't.