Kairos' future vision wasn't the most perfect ability, as strong as it was. Whenever Kairos decided to do something different based on something he saw in the future, there was a split second where his future vision would warp to shift to the new version.
And that split second was something like a blindspot for him.
That was why he wasn't able to notice that he had been shot through the leg before it already happened. Though he was able to feel the aching that came from after the injury, it was hard to distinguish it since his body was already aching from straining it to move all this time.
The girl with blue hair's eyebrow jumped ever so slightly, like she was surprised that she was actually able to get a hit off. With this, she was encouraged to continue shooting, and so that's exactly what she did.
Kairos rushed closer towards the girl, using the momentum of the spiked ball to make him go faster. At the same time, the girl once again pointed a finger gun right at his legs.