Nastya Rasputina

Nastya Rasputina (played by an anonymous actor) is the ship's engineer, and plays viola, violin, and synth for the band. Her mechanism is quicksilver blood. She is dating the Aurora.

Origin
Also known as Anastasia Nikolaevna Rasputina, Nastya was the youngest child of Tsar Nikolai of Cyberia, a high-tech planetary society of machines and virtual realities. She was killed during the Storming of the Winter Palace by the Revolutionary Movement, but was revived and mechanized by Doctor Carmilla.

Once Upon A Time (In Space)
During the events of Once Upon A Time (In Space), Nastya arranges for the Mechanisms to free the Briar Rose, because Aurora was upset about King Cole's use of the Briar Rose to power his defense grid.

Miscellaneous
Nastya was present when Doctor Carmilla went out the airlock.

Tutor
Nastya's tutor was working with the rebellion. Though originally they seemed like a mentor figure, they ended up killing Alyosha (Nastya's servant and one of her only friends) and Nastya as well.

The Aurora
The Aurora is Nastya's girlfriend. This is partially due to the fact that Nastya registers machine/human relations in the same way that most people would human/human relations, but Aurora is also sentient.

Hiatus / Cyberian Sequence
During the events of Ulysses Dies at Dawn, Nastya leaves the rest of the crew for a while and undertakes a personal quest on her home planet of Cyberia.

https://themechanisms.com/fiction/drive-the-cold-winter-away/

https://themechanisms.com/fiction/nomadic-spacers/

https://themechanisms.com/fiction/cyberian-demons/

Departure
Nastya leaves the crew before the events of The Bifrost Incident. She says this is due to the Aurora not being the same ship anymore- being replaced, piece by piece, until she was a different person. Instead of going anywhere, she just lets herself float off into space.

Trivia

 * Nastya disliked Guardians of the Galaxy as it wasn't scientifically accurate.
 * Nastya tends to stay on the ship, rather than going out with the rest of the Mechanisms.