That followup is known as the Joker, and though he doesn't look terribly serious, he nonetheless brings the pain as well as your average comic book supervillain. According to an Outspark press release, the Joker is "an agile melee fighter who can deal a great deal of damage to his opponents in a short period of time." Additionally, Jokers boast their own class-specific system which involves absorbing souls from defeated opponents to strengthen subsequent attacks.
Weapon-wise, the Joker favors claws and dual swords. If you're interested in learning more about the class, or if you're ready to download Fiesta Online, head to the official website.