Guest's best friend. He died in an accident along with Guest and sets out on a journey to defeat the Demon King with a party including Guest. Skill: Create Water (Creates a waterfall over the opponent's head to drench them). Skill: Steal (Can steal an opponent's possession, though the item is random. The higher the luck, the better the loot. 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. Since Kazuma chose Aqua herself instead of a weapon, she ended up being forced to join the journey to defeat the Demon King. Skills: Basically anything related to water. Can also purify water. However, if there is a large body 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.

An Arch Wizard of the Crimson Demon Clan. She possesses an incredible amount of mana, but she refuses to use any magic other than Explosion magic. Once she uses it, 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 leaves her immobilized after one use. Furthermore, she can only use it once per day).

A blonde-haired, blue-eyed Crusader with beautiful looks and high defensive power. However, she is a hardcore masochist with a wild imagination. She joined the party after seeing a girl get her underwear stolen by Kazuma's Steal skill. Skill: None. However, her sword and armor provide enough strength to make her one of the strongest members of the party.