Chapter 266: Blood Demon vs Flame Hashira - A Dance of Sword Styles! (I)
That Kai could use Telekinesis must have already been found out by the Demon Slayers.
Kai had to use it against Tanjiro just after coming into this world. Analyzing demons was a part of their daily routine for them, and more so when their life depended on it.
Not to mention, Rengoku was a Hashira, with unparalleled instincts of his own, his strength, reflexes, and swordsmanship even greater than Kai.
The moment Rengoku's feet touched the ground, he vanished again.
Flame Breathing - First Form...
The burning katana came for Kai's neck horizontally, and this time, even the energy field failed to deflect or slow it down.
... Unknowing Fire!
Kai horrifyingly realized that the energy field hadn't slowed the slash down last time, either.
Rengoku had faked the resistance.
An even more terrifying realization was that his Advance Telekinesis was fluctuating intensely as the sword got closer to him.
Kai had already deduced that Electromagnetic Interference caused the Spiritual Currents in his surroundings to go haywire, resulting in the failure of Telekinesis. Now, he couldn't help but relate his armor's energy field's failure to his Telekinesis' failure as well.