Classes (gender-locked, likely due to lore)
Ji Ci - Gunslinger: Mech guy with dual pistols. Weapon skill can also change weapon into a flamethrower, etc.
Gu Yue Cheng - Blademaster: Katana, fast attacker
Ga Na - Assassin: Dual daggers, aerial combo-er
Kui Guang - Brawler: Fists
Long Xia - Swordmage: Sword, crystal (orb?). Sword can change to a greatsword from what I see. Also has ranged magic and sword-summon skill (Revelation's Sword Salvo).
Suo Luo Ya - Druid: Healer, uses magic rod to cast attacks.