Guest's best friend. He died in an accident along with Guest and sets out on a journey to defeat the Demon King with Guest and several others. Skill: Create Water (Creates a waterfall over the opponent's head to soak them). Skill: Steal (Can steal an item from the opponent. However, what is taken is random. The higher the luck stat, the better the item stolen. Since Kazuma has high luck, he usually steals underwear from girls and weapons like swords or underwear from men).

The Goddess of Water. She sent the deceased Kazuma and Guest to another world under the condition that they could take one thing with them. However, since Kazuma chose Aqua herself instead of a weapon, she was forced to join the journey to defeat the Demon King. Skills: Basically anything related to water. She can also purify water. However, if there is a large amount of water like a lake, it takes about half a day. Skills: Can use purification magic. If she uses purification in a town full of monsters, most of them will be purified and defeated.

A mage of the Crimson Demon Clan. She possesses an incredible amount of mana, but refuses to use any magic other than Explosion magic. Once she uses Explosion, the mana consumption is so intense that she becomes unable to move. She is a member of Kazuma's party. Skill: Explosion (Powerful enough to level the surrounding area, but she becomes immobilized after one use. Furthermore, she can only use it once per day).

A blonde-haired, blue-eyed Crusader (a knight-like class) with refined looks and high defensive power. However, she is a hardcore masochist with a wild imagination. She joined the party after seeing a girl have her underwear stolen by Kazuma's Steal skill. Skills: None. However, she possesses sufficient strength with her sword and armor to rival the top members of the party.