(Flashback)
"There is something we have to tell you before the battle," Astra had called for their friends, she left it to Kiryuu to talk to Osamu and the rest.
It was inevitable that Kaito's eye would change color once Yuuno started using his power as a Superior as well.
He may have no memory of being a Superior because it was left to Kaito but the power was there and when he uses it, Kaito's eye would act up in response to this.
As they settle, Astra looked at Kaito and nodded her head.
Kaito closed his eyes and when he opened it again, his left eye had changed to the galaxy colored one.
They were shock to see this.
"Wha- What is this?" they asked.
"It seems half of what was in Yuuno, is in Kaito as well," Astra replied.
Since the Superiors are legends, their characteristics are forgotten as well.
"How did you know?" despite the shock Xenon asked her.