The Ultimate Leap!
The reason why Kui and Armona were the ones standing watch during this time was, naturally, because Youshen had left the camp.
As for what could possibly drive Youshen—who had been a total homebody at the base for a whole year, with no recreational activities whatsoever save for occasional moments of relaxation with Grace and Ignis—to venture outside, it could only be one thing...
Chapter 125