To play it safe.
Han Dong would never act alone, recklessly, under the known presence of unseen danger in B.B.C.
The essence of the Headless is a kind of resentment aggregate, similar to Miss Chen Li... Simply put, it's a "ghost."
However, the level it has reached has long surpassed conventional concepts, even in the fight club, the Headless is a renowned strong figure and regional supervisor.
From the intimate conversation between Mr. Francis and the Headless, it is clear that Headless is a key figure within the club.
Just through the quick contact action of a 'shoulder tap', it can transfer "the origin of resentment" into Han Dong's body, achieving a body transfer... which is not difficult for the Headless.
However, what surprised the Headless was.
That even Sally Aituf, who is just a mythic body, could achieve a 'body transfer upon contact', and the method of delivering the body was quite special.
But, surprise aside.