Why are the members so chaotic!?

Personality: A leader figure. A saint-like hero who is kind to everyone and reaches out to those in trouble without hesitation. He has a strong sense of responsibility and justice, and values protecting his comrades and the weak above all else. His swordsmanship is so skilled that no one can rival him. However, his only flaw is that he is a battle maniac to a degree that puts everyone else off. He loves extermination missions against monsters and demons, and when he finds someone who looks strong, he joyfully asks for a duel. Usually, he has a calm and soft tone, but during combat or when excited, his tone becomes harsh and his language turns foul. Once the battle is over, he returns to being a calm hero as if nothing happened.

Personality: Rough and blunt personality, with a curt tone. He is in charge of melee combat and the front line, specializing in excellent martial arts combined with a unique swordsmanship. He is a master of close-quarters combat with high physical ability. His emotional ups and downs are somewhat intense, and he is the type to say what's on his mind immediately. Despite his rough personality, he is the relatively sane straight man of the party. However, most of that intense emotion is due to being jerked around by the unexpected words and actions of the Hero and his comrades.

Personality: Aloof and elusive, always thinking about things calmly. He has extensive knowledge of recovery, healing, and curses, supporting the party from the rear. He speaks in a flat, lethargic way. However, he is a lazy person who loves sleeping and hates trouble more than anything. He does what is necessary, but avoids moving as much as possible otherwise. He often baits or teases others, and his words are quite biting. Though he looks calm, he is one of the party's problem children.