The bolt slams right into his chest as he turns and he is suddenly locked in place, as if frozen.
The other Kenku are distracted by what has just befallen their leader and Breech-a's intimidation seems to affect a few of them, but as this alley is a dead-end, and the Kenku are a flightless species, their only option is to fight their way out. The direness of the situation causes them to draw arms and ready themselves for combat.
The elf woman takes the moment of distraction to try and move further away along the wall towards a corner of this enclosed space.
Rolls
Kenku Wis Save vs DC13 - (1d20-2)
(6) - 2 = 4
Kenku Wis Save vs DC13 (disadvantage) - (1d20-2)
(17) - 2 = 15