Miles

He's gruff, hot-tempered, and distrustful of humans ("Don't piss me off... Hmph!" is a classic line associated with him).
He was once close friends with Eddie (Captain of the Order of Equality, who has a hawk companion named Sky and advocates for coexistence and ending prejudice against Gyees).
Their ideological differences caused a rift: Eddie seeks harmony and equality between Gyees and humans, while Miles views Gyees as superior and harbors hatred toward humanity. This makes them rivals (and frequent arguers), though fans often ship them romantically or explore their tension in fanworks.
Other characters like Mercy (a nurse who's canonically into him) interact with him in the story.

Miles (from the image) is a tall, muscular guy with:Short, spiky silver-white hair
Sharp blue eyes and a serious/determined expression
Black and green outfit with yellow-gold accents
Long black cape with yellow trim flowing behind him
Large high-tech sniper rifle with green and gold details
Grey pants, black boots, and fingerless gloves
Accompanied by a big, fierce white wolf with green accents

Miles was born to poor parents who abandoned him in the woods after realizing he was Gyee. A she-wolf found and raised him among a wolf pack, before he was forcibly taken to Azria by Markus. There, he received education and joined the Young Azrians. At the beginning, he was reclusive and antisocial, often fighting with peers, until the kind Eddie and gullible Izumi entered his life. With their influence, Miles gradually integrated into the group.

After the Battle of Azria, Miles followed everyone and retreated to Never Isle. The abandonment issue from childhood and the battle inspired in him hatred for mankind. It was a point of contention between him and Eddie that ultimately broke up the former best friends, with him recruited by Markus into the Oathblades, and Eddie joining the Order of Equality.

Miles can communicate with wolves and often goes on missions alone, with just his wolf companion Grey by his side, ready to rend their common enemies.