The Ewers Birthmark (エワーズバースマーク Ewāzubāsumāku?) is a carve pointed letter "E" appearing in the region on the back of their right shoulder on all Ewers or individuals of or in certain ways connected to the Ewers bloodline.
Amber also received this birthmark after inhabiting the Ewers's Bloodline through her powers after Baxter transfered his blood into her wrist thus officially making her a family member of the Ewers. The same applies for Melissa and Lexi.
Other bloodline members related to the Ewers such as the Slade Family contain a Ewers Birthmark as well, except it's on the back of the left shoulder instead of the right.
The Birthmark also is an enemy sign to a few villains in the universe, such as Desi Delao and Francis Aslan. Must, however has less care about the Ewers Bloodline and only wants to torture Baxter himself only and no one else.
The Ewers Birthmark applies to all universes AUs of the Ewers Family.
Ballard Ewers III