Most likely some kind of human or alien cyborg.
Airiam's nature has been subject to a number of divergent background statements. StarTrek.com described Airiam as being a "synthetic-Human hybrid", while Ted Sullivan tweeted that she was an alien. Meanwhile After Trek: "Episode 3" described her species as "augmented alien", while After Trek: "Episode 5", involving Gretchen J. Berg, Neville Page, and Glenn Hetrick called her instead an "augmented Human".
https://memory-alpha.fandom.com/wiki/Airiam
IMDB for S2 had listed Hannah Cheesman just as "Airiam 2.5", but now it's changed to "Lt. Cmdr. Airiam" for the first 2 episodes and "Airiam 2.5" for 1 episode.
Sara Mitich is listed as "Lt. Nilsson" for 3 S2 episodes including Brother. She might be the one helping set up the gravity simulator if they kept her blond hair.
Anybody see any other references to this? The Airiam makeup does look different so far and that does look like Sara on the left.
