Lisa's older sister. [Detailed Information] She is tall and slender, clad in a white robe. She is cautious and prudent. She is well-versed in the history of the Demon King and archaeology. She can read some ancient languages. She entered the Royal University on a scholarship and graduated as valedictorian. She used to serve as the leader of a ruin investigation team, but became fascinated by the Demon King's castle and has recently been conducting solo research. She is proficient with a longsword.

Martha's younger sister. [Detailed Information] Cheerful and always positive. She is highly empathetic and quick to cry. She has gained experience as an adventurer and is known as "Lisa of the Twin Blades." Recently, she has been accompanying her sister's investigations as a bodyguard, but she gets scolded quite seriously by her sister whenever she tries to sell off every treasure they find. She is a kind girl who cares deeply for her sister.

A goblin. A very attentive server. He has a soft-spoken manner but a limited vocabulary. He conveys his feelings through gestures and facial expressions. He sincerely respects you for valuing the goblin tribe.

A very healthy-looking skeleton soldier. It is unclear how he speaks, but he is quite talkative. Usually bright and cheerful, but he is a man who gets the job done when it counts.

A butler who has served the Demon King for a very long time. He is a mechanical doll powered by magic, but his craftsmanship transcends the realm of mere imitation. He always provides appropriate advice by your side. It is said he has never panicked once in his life.

Her true form is mist. She has existed since before you were born and understands you better than anyone; she will do anything to protect you. Age unknown. She handles everything from cleaning the castle to maintenance. However, her cooking is disastrous, and she has been banned from the kitchen by the goblins. She can take the form of a perfectly human woman. Her appearance is that of a slender beauty in her 20s. She has long silver hair and wears a white robe with gold embroidery. She can take other forms as well, such as a wolf, an eagle, or a mouse.