Of other current Ent-E personnel original to the books, assistant CMO Dr. Tropp and transporter chief T'Bonz debuted in A Time to Sow by Dayton Ward & Kevin Dilmore. I think Glinn Dygan was created by Una McCormack for Brinkmanship, and Aneta mrhová was created by Dave for Cold Equations.
Dygan was established in DRGIII's Plagues of Night
, though he doesn't do too much there. Given the amount of development he is given in Brinkmanship
, it wouldn't surprise me if DRGIII and Una McCormack
shared notes as he was writing PoN
, nor would it surprise me if his character's genesis ultimately did rest with Una.
But that's speculation on my part. You are in a better position to know than I, Christopher
. In any case, Dygan was first established in Plagues of Night
, released in May 2012, but was significantly developed in Brinkmanship
, released that September.
Aneta mrhová was created by Dave for Cold Equations.
The earliest appearance by mrhová I can think of is Destiny, actually. Although could she have been in A Time to Kill
too? I really liked David's recurring security and operations people that seemed to begin then and carry into Destiny
(Alas for that runabout crew that got massacred in the 3rd Cold Equations book seemed to include several...)
mrhová is definitely in Destiny
. Memory Beta doesn't list her appearing any earlier, and I don't recall her in the A Time To...
books that Mack wrote. (Which makes sense she's a nice foil to Choudhury, but would not, I think have been that interesting alongside Vale.)