Synthetic
There were a lot of things in this galaxy that made no sense. There were things that Shepard had encountered on her missions that probably shouldn't even exist. Like the Thorian on Feros. That was a talking plant. Or Sovereign – a talking reaper. But on board the derelict reaper today, Shepard never thought she'd find what she found today.
A talking geth. A single geth unit that could talk all on its own. Which made no sense because Tali argued saying a single geth would have the intelligence equal to that of a varren. The thing probably saved their lives, which got Shepard interested. She wanted to learn how this thing knew her name.
With the Reaper IFF recovered, the suicide mission could begin shortly. That damned geth had been disabled by a husk, which prompted Shepard to grab the thing after destroying the core and bring it back to the Normandy. Now she was facing it, working up the courage to activate it.
With a small breath, she illuminated her omni-tool and started the activation process.
Tali is gonna freak she thought.