I doubt anyone knows but how can we ALWAYS stun Esix?
I know, because I created the battle mechanics for Esix. There’s no way to always stun her. It’s RNG based. Getting to always stun Esix is therefore chance related.
I will reveal this. Every move you can do as the player has a corresponding attack from Esix that will stun her. If you get her stunned, then that means that move has a chance to stun her when she uses that specific attack.