Hailing from a treasure hunting family, she is perhaps the best in the Netherworld at finding things. Her abilities caught the attention of King Krichevskoy, who took her in. She claims to have taken care of Laharl when he was younger, but no one remembers if that is true. She has a tomboy-ish side to her, but is actually very susceptible to kind words.

A demon who used to work for King Krichevskoy when Laharl was still a baby. She claims to have personally taken care of Laharl. One of her biggest characteristics is how she talks, and amongst the Krichevskoy Group, she is the most uncouth.

Of all the demons who worked for King Krichevskoy, she is one of the few who often interacted with Laharl. When she speaks to him, she treats him almost like a baby. Here are some excerpts that show what kind of relationship they had!

◆Rainier is Laharl's worst enemy!?
Laharl hates busty women!

Even Laharl, who is the Overlord of the Netherworld, has some weaknesses. One of them is busty women. Laharl doesn't actually know why he doesn't like busty women, but when Rainier rubs her body up against his, he just wants to scream his guts out...

Rainier talks to Laharl as if he were a baby.

Laharl is dealt a lot of damage by Rainier's body!

Diagnosed with Evil Eye Exaggeration Syndrome, he always claims to have a Majin sealed away within his left arm. He is really bossy, and boasts of his immensely powerful spells, but he actually has no spell casting talent. He calls himself the Obsidian Winged Destroyer, but to this day, no one has yet to see his wings.

He is a demon who claims to have been one of King Krichevskoy's advisors. He strongly opposes Laharl's Overlordship and is looking for a new candidate for Overlord. Ideally, he wants an Overlord he can control, and would actually prefer to control things from behind the scenes. He is married and has a kid. His wife makes him work hard.