Quinn has spent more time in Carnell than some of the newer PCs. He, Phar, and Aureus were part of the initial group that took the job to find Lord Pendour's body, so he's gotten to know many of the local warriors beyond just the main town guards. In the little downtime he's had, Quinn has spent time drinking with not only Sir Gareth, but also Mabon Bronzethegn.
On his first night in the village, he got to know Timmin and the old fighters good friend, Wilbur Anthonyson. Quinn knew Timmins was a good fighter before the man came to the island with the PCs, although he's retired from the adventuring way of life. Sir Gareth being missing is troubling to Timmins and he's likely going to help the militia go look for the missing sheriff and Quinten along the beaches.
Quinn and the other PCs fought alongside the young guard, Raius Bellath, against the wererat known as Odilos. It is too bad that Raius suffered the poisoning he did from the wererat's weapon. Quinn knows Raius is one of the most skilled warriors in the village.
Quinn only knows Elijah Wortham as the other man who came with the PCs, along with Sir Balorix and Sir Avanth, to evict Hornauer and his brood from Gurnard's Head. He's spent little time with the man otherwise.
Quinn hasn't spent time with Sir Ghal's young cohort yet, although The Guardian speaks highly of his protégé. Ailward Stepney seems to spend most of his time in Pendour Manor. Quinn knows that both Sir Ghal and Ailward live in the manor full time.
Quinn's rising fame in the village, and pending knighthood, if he wants it, has brought many of the young warriors and fighters into his circle to try to learn to fight from him. Most of them are young and inexperienced, and it seems that the members of the militia who died were the least experienced.
In game terms (as noted already), there are three 3rd-level warriors, fourteen 1st-level warriors, three 2nd-level fighters, and nine 1st-level fighters. These are the members of the militia and Quinn has spent time training with the higher level fighters and warriors. He hasn't spent any time with the younger pups.
Most of the militia members are human but there are a few dwarves, two halflings (one male/one female), and a half-elf (male). There is an equal amount of males and females among them as the Strandlands has a strong warrior tradition among both genders. The three 3rd-level warriors are all human and one of them is female. The three 2nd-level fighters include a female human, a female dwarf, and the half-elf. All of the 1st-level warriors are either male or female humans. The fighters include the two halflings, another three male dwarves, and the rest are human (equal gender split [2/2]).
Quinn has heard rumors about some sort of hidden monastery of monks along the shoreline to the northeast. These rumors come out during the drinking that follows sparring. He hasn't had the time to investigate this rumor, and he's certainly never seen anyone who looks like a monk in the village. Quinn often fought alongside or against monks in the arena.