A Main Character

Josuke (Located in the center of the town): Josuke is the main quest vendor in JoJo's Bloxxy Adventure. He helps you by offering quests to kill enemies for extra XP. Each time you complete his quest, he rewards you $100 and increase your level by 5.

Note: There's also a dialogue which shows "I don't remember giving you a quest !", means that it has to be related to something.