Koss

Koss is one of the the Heroes (customizable party NPCs) available in Guild Wars Nightfall.

He is a member of the Order of the Sunspears.

From the Nightfall product info page:


 * KOSS: A cheerful, boisterous fellow Sunspear, Koss has almost as much faith in you as he does in himself.

Armor
Koss starts with basic Warrior armor, including a Brute's Helm, which is labelled as Sunspear Armor but has its own unique appearance, like all heroes, his headgear is hidden. His armor has +1 strength, +20 armor vs physical damage and an AR of 23..80 depending on his level.

Recruitment
Koss joins the party after completing the Into Chahbek Village primary quest. His recruitment is mandatory to progress in the storyline.