Zin Vathek, also called Zin the Unmovable, is one of the main party members with Estelle Bight and her friends in the Trails in the Sky trilogy.
Zin is very huge (which many characters note when they first see him), and his sense of clothes obviously is shown from his descent from the Calvard Republic. He wears a yellow scarf over his neck, has a bottle of alcohol for himself to drink, and he has brown hair with some sides sticking up. His weapon of choice are his gauntlets to greatly enhance his martial arts.
Zin's personality is one of an honorable man as he helps Joshua and Estelle just because he wanted to help out a good friend of his. He is very chappy with his fellows and he loves to drink a lot. He stills acts like a big brother to everyone despite his huge and scary stature. He is also fond of comely lasses used to help the party out one time.
- Zin's English voice actor, Patrick Seitz, is the same voice of Dogi, a main character from another Falcom series called Ys.
- Initially when the Trails series was localized, Zin's name was changed to Zane through no concrete reason.