Marius von Raum

Marius von Raum (played by Kofi Young) is the ship's doctor on the Aurora; he sings and plays violin and mandolin for the band. His mechanism is his right arm.

Origin
Marius joined the crew around the same time as Raphaella la Cognizi, while Ivy Alexandria and Nastya Rasputina were elsewhere. It is implied that he may not have been mechanised by Doctor Carmilla.

He is from a world which used to have incredibly powerful technology, but downgraded through years of war. While hiding from soldiers, he and another person found an army of ancient mecha and attempted to use them to fight back/stop the war, but failed.

Ulysses Dies At Dawn
Marius was present in The City during the events of Ulysses Dies at Dawn. The album liner art shows a flyer for a lecture by Dr. Marius von Raum on "The Psyche of the Olympians", now cancelled. He is implied to have helped Ashes O'Reilly set up surveillance equipment around the City.

High Noon Over Camelot
Marius was at Fort Galfridian at some point. He took part in the Saxons' sacred ritual of staring at the sun until you had to look away and succeeded in staring at it for a very long time due to his immortality, which resulted in them thinking of him as some kind of prophet.

The Bifrost Incident
Marius is one of the Mechanisms who talk to Lyfrassir Edda during the events of The Bifrost Incident.

The Ignominious Demise of Dr. Pilchard
See Tales to be Told

To capture Marius, Dr. Pilchard just asks him nicely.

Death
Marius was always more sceptical of the Mechanisms' supposed immortality and is not surprised to discover he will have a permanent death. He is eaten by octokittens when he checks on them after they've not been fed for several decades, with Jonny recording the attack as taking 11.7 seconds.

Trivia

 * 'Baron' is actually a corrupted version of Byron, which is Marius' real first name. Marius isn't actually a baron.
 * Marius isn't a real doctor. According to Drumbot Brian, ship's doctor is the job they're most comfortable giving him, and it keeps him busy.
 * Marius is 5'5" and very thin because of the lack of food on his home planet.
 * He sometimes plays violin without realizing it.
 * His character is partially inspired by the fighter pilot the Red Baron.