Powerful Shapeshifter

Gradier Xanatus's eyes widened as he heard this.

"It would see right through your disguise," He said with a tone of realisation. 

While Shape-shifting bloodlines were extremely rare there had been well-known shapeshifters in the past. 

Centuries ago they would disguise themselves as anyone and get away with crimes and even blame innocents. This used to be a headache to the authorities and they found it really hard to apprehend criminals with bloodlines related to shape-shifting.

This was until they found a way to unveil shapeshifters with a new piece of technology. Said technological generator had these Glatarid components within.

Some CCTVs still had these which was why Gustav would always be careful in some areas even when making use of shape-shifting to change his identity.

This glatarid would uncover anyone who used shape-shifting to try and take Yung Jo's identity.

"What do we do?" Gustav wondered out loud as he held his chin.