I See One Second Into The Future: Loner In The Apocalypse - Chapter 94 Twins

... he was, it would still take quite a while for her to get back up.

Kairos hesitated for a moment, but turned around before rushing down the bloody pathway.

From how he saw it, this was a good opportunity while they were separated to finish one of them off. Since Darren seemed pretty badly injured, that was naturally the one he wanted to go fight.

Not to mention, he didn't have any contingency plan if he fell down the spiral staircase, so he had no plans of trying to fight ...