Introduced in Issue 2. Marlene is one of the "junior" members of the Vigil, that is to say, although it is never specifically stated I believe she and James, like Sam, are not "Ancients". They've joined the vigil within the last hundred years or so.  Maybe sooner.  Although there is a definite "steampunk" influence to Marlene's attire that could mean she has been around a little longer than the others.  Giving how their individual "uniforms" are formed by them holding Bernie's Scythe and thinking about their favourite outfit.  Marlene has the ability to warp time and run really fast, kinda makes her the Vigil's "Flash".  She's very confidant, something of a practical joker and has an obsession with photography, or more specifically getting a picture of Bernie.  The Vigil is a very tight knit and loyal group, with each member having a strong sense of family, and Marlene has gone to some extremely inventive lengths to adapt her camera equipment with the aim to achieving a true family portrait of all the Vigil members including Bernie.  (Apparently Reapers don't photograph.  Who knew?) I didn't have any specific ideas about type of voice or accent.  We really aren't given much background on these people, so it gives the actor room to make the part their own.  So, let's see what you can do!  This is a supporting character, she is in most of the book, although she doesn't have many lines. But here character does definitely contribute!