Dr. Lin is a Terran starfarer and the last member of Red Raven's core crew of shiphands. No surprises, he serves as the crew's doctor, which is not only important for maintaining the well-being of the crew on an extended starship voyage, but also to have a medical professional on hand to treat injuries when the Jackrabbit arrives at a ship in need of a tow. Dr. Lin is a proud and very confident man to a degree that skirts the border of arrogance without fully crossing over. His practice specializes in xenomedicine, exploring the medicinal traditions of the Sol system's many worlds and tying them into his core practice of science-based healing. The good doctor takes great pride in understanding the inner workings of the major starfaring species of the systems and treating each with regards to their own needs, rather than treating everyone through the lens of Terran medicine- even the hominids from the four Inner Belt planets have their own physiological differences and medical needs, and Dr. Lin would be more than happy to explain his practice in treating each of them. When you're not sure who might be waiting aboard a disabled spacecraft, having a professional on hand with this breadth of experience is a boon to a crew who will often be the first and only aide to arrive in a remote point of space.
The root of Dr. Lin's practice focusing on medical diversity stems from his origins growing up on Terra. Being the planet in the system with by far the most optimal natural conditions for sustaining life, Terrans are the most physiologically-diverse group of sentient life occupying any one planet. Terrans can come in many shapes and forms, as Red Raven's own Lydia can attest, and this inspires Dr. Lin to always push the boundaries of his understanding of living biology, ensuring he check his assumptions as they emerge. The crew of the Jackrabbit are a diverse and motley lot, and Dr. Lin likes to take a proactive approach to keeping them healthy on long voyages. He will regularly encourage at least one half hour of physical exercise every day, leading the organic members of the crew in regular workout sessions much to the amusement of Clover and Haley, the crew's two androids. They may not benefit from muscle stretches but they are not exempt from Dr. Lin's care, as androids are sentient lifeforms and he wants to pursue knowledge of how to treat them just as well as any other crewmember. There will be more on that in a paragraph or so.
He may be a proud and virtuous man but the doctor is not without his vices. In particular he has a fondness for gambling, which caught Scarlet's attention immediately. Dr. Lin requested a mechanized mahjong table be installed on the Jackrabbit, as he brought his favorite tile set aboard. He plays a regular mahjong series with Amy, Scarlet and Bell- the challenge of playing with a Mercurian who can read the dealer-machine and a Mercurian who can read discarded tile values is offset by the presence of a Neptunian with sharp teeth who doesn't care much for being cheated. Dr. Lin enjoys the challenge of this group and they all tend to circulate their money between each other, and the spectacle of listening to the four of them play can help make longer journeys a bit less tedious, and for Scarlet in particular goes a long way towards helping keep her mind off the void of space all around her. The doctor also has no particular qualms with the crew's criminal habits, seeing the extraction of hoarded wealth as an inherently noble practice with the caveat that their score in part be paid towards the needy, a caveat that calculates favorably in Clover's moral mathematics. He is nimble and athletic but his favorite role to play on a heist is to be a decoy or a distraction, the sort of high-risk role on a job that requires a bit of finesse, adaptation and good mind for acting. Dr. Lin loves the opportunity to put on a little bit of a performance while the rest of the crew does their thing, always sure to ask how he did when a job was done.
The Red Raven crew came to meet their last core member in the wake of a heist gone bad. The crew had been flying a salvaged craft other than the Jackrabbit and had just lifted the Ursa Minor- smaller of a pair of exceptional gemstones- from its vault on a private estate on Terra. A mishap occurred which ultimately led to the little ship trying to shake pursuit by Interplanetary Police; Lydia was able to overclock the ship's warp drive and blast them out of immediate danger into an emergency crash landing in a remote desert on Mars. The ship and its crew took some damage, so they hid in the shadow of the rim of a Martian crater and waited for the heat to blow over. Lydia and Slug were the least worse-for-wear of the crew so they were volunteered to check out a nearby settlement for medical help. The pair managed to find Dr. Lin at a card table in a small tavern, his traveling practice having past through the remote area just recently. Since Slug is so bad at lying, Lydia timidly asked for his help, offering to pay a lot of money for discretion. More than happy to oblige, Dr. Lin followed the pair back to the Red Raven crew's hideout, only to find Amy doing some emergency repair work on her android friends Haley and Clover, who'd taken a bad scuffle in the emergency landing. Ever the professional, Dr. Lin set to work patching up the mixed team of Callistan, Neptunian, Europan, Terran and Mercurian crewmembers, and afterwards expressed his intense curiosity at Amy's treatment of the androids. She didn't regard herself as any sort of a doctor but Dr. Lin regarded her work as being within the scope of care for a medical professional and wanted to learn more- Haley seemed a bit shy at being a medical spectacle but Clover found the exchange fascinating.
With a stolen gemstone on board, Amy made the quick decision to offer Dr. Lin an opportunity to learn more about android healthcare and also to share his practice with a wide range of starfarers by joining their crew as the ship's doctor. Dr. Lin was immediately drawn in by the opportunity, happy for a chance to make sure his new patients mend well; Amy was immediately grateful the doctor didn't have a permanent practice already, since as the newest member of her crew he was now complicit in the theft of Ursa Minor and she could rest easy knowing he wouldn't sell them out to the cops. And with that agreement the motley crew of Red Raven Towing and Salvage was formed.