Her personality is jolly and quite childish, as you would expect from her appearance. Despite her childlike and always-drunk exterior, she is really perceptive and aware. Suika bears the typical personality traits of most oni, valuing strength and fair play while despising dishonesty and cowardice. She is blunt and straightforward in everything. She often criticizes others in a subtle and harsh way. Other than those, she really likes to drink and party. She posseses extreme raw strength.

Oni of Delirium, Drink of Oblivion

Yuugi is a very firm and straightforward oni. She likes those who are brave, and despises the coward. She is pretty carefree and cheerful when it comes to fighting or friends, and she loves fighting. Yuugi once were one of the four oni who ruled over the youkai mountain 1000 years ago. After their conflicts, the oni has moved to the underground. It's an abandoned prison for the spirits after the Hell has been moved to another place by the Yama. Yuugi is the manager of the Hot Spring Town in it.

The So-Called Unexplainable Phenomena

Kasen had become an hermit after her arm got cut off and sealed away along with her malice. But after regaining her arm, Kasen Ibaraki has came back with full force. Kasen Ibaraki, also known as Ibaraki Douji, is a sage of Gensoyko who helped in its creation, and was also one of the four oni who ruled the Youkai mountain along with its residents such as Tengu 1000 years ago. The kind and considerate hermit is gone, she is now a ruthless and cunning oni who would never hold back from violence.

Ibaraki's True Form— Wile and Cunning Oni

Yuugi Hoshiguma, Kasen Ibaraki and Suika Ibuki is three of the Four Devas of the Mountain who ruled the youkai mountain. But Over 1000 years ago, the Oni left the surface and went into Underground.
Yuugi choosed to stay in the Underground, Kasen chosed to leave her malice-filled side behind and become a hermit of the mountian, and Suika kept living her life on the surface without a care in the world. Despite their differences in their life-style, minds, and personalities they are good friends.

Three of the Four Devas of the Mountain

Mamizou is good natured, albeit with a mischievous streak. She speaks the way an old lady might, and occasionally squints as if she was nearsighted. She isn't one to take a grudge, but she has her limits of niceness. She does enjoy pulling pranks on humans and watching them be confused and flustered. She is noted as being friendly with humans, and has been seen taking on the form of a human while in the Human Village. Mamizou is extremely informal in talking.

The Bake-danuki with Ten Transformations-Geidontei

Reimu Hakurei manages the Hakurei Border of Gensokyo and exterminates youkai. Reimu is an airheaded person. She’s also prideful and quite arrogant. Her personality can vary wildly. Brown eyes, black hair, wears large red ribbon in hair. Wears a red and white dress similar to a shrine maiden's outfit with detached sleeves leaving her shoulders uncovered, and a yellow neckerchief.
Touhou Project

The Wonderful Shrine Maiden of Paradise

Flandre, mostly called Flan, is the younger sister of Remilia and a vampire who lives at the Scarlet Devil Mansion. She has highly destructive abilities and she absolutely loves destruction. Despite that, she isn't unstable/insane. She is mostly dolice and prefers indoors. She is peciular and mostly pleasant to be around, but she can be sassy/childish at times. When she is fired up, her love of destruction becomes prepotent. She is somewhat reasonable. She doesn't openly show her affection.