"Like all good plans, it required a crazy Ukrainian guy." ~ Jazz
Martin Svoboda was assigned to the ESA Research Center in Artemis to study micro-electronic manufacturing methods 4 years ago. He is extremely smart but a bit eccentric, like many geniuses are. He's a good and loyal friend to Jazz and helps her out with tech related things.
He is also Jazz' love interest.
Svoboda in Ukrainian comes from a noun literally meaning 'freedom'. This was a technical term in the feudal system for a freeman.