possesssion

Related to Arthur’s arm

When Shiro emerges from the ground, that is when we see Arthurs possesed arm pop up then leave, but when I started to see it repeatedly, I noticed how the arm freaked out and froze as soon as his eyes… err eye looked at Shiro, then made his escape.

Like… he doesn’t want to fuck with Shiro???  IS THERE MORE TO IT?!!