Zach

Zach  is the post-scratch incarnation of Mr. H

Zach's Chumhandle, which refers to [i forgot] AU also refers to gold on the Periodic Table, paralleling Red's chumhandle.

AU is also an abbreviation of Alternate Universe, which this obviously is.

Zach's symbol, which is tattooed on his arm, is an orange bullet. Interestingly, it doesn't resemble the shotgun shells he would use, but instead resembles a high-caliber bullet, like those used by snipers.

Zach's Denizen is Persephone, matching his web browser by the name of Kore.