Z-one

a mysterious amchine rumored to have to do with Yliaster shaped like a comma is seen in an unknown area inside Security's main computer room. It as has been shown in a close-up with a single visible blue eye, and human feautes, further making this creature an enigma.

WRGP Arc
This mysterious creature appeared after Sherry and Bruno atempted to scan her Z-ONE Card, apparently warping them, and Yusei Fudo to an unknown computerized world. Later, after they all wake up near a lake along with Mizoguchi, Yusei speculates that it has something to do with Yliaster