Oni

Kuniyoshi Ichiyusai, Imperial Bodyguard Fighting with a Demon, pub. Kawaguchi-ya Uhei, 1825. (Public Domain)

The subject of many myths, oni are a violent, malevolent demon race from the Spirit Realm.
They're large, muscular brutes who often prefer to use a spiked club. Giving an enemy a gore spattered end with the swing of his weapon makes their day. Super natural strength combined with their size, makes them formidable.
Unless, lead by one of their own kind they don't make good soldiers. Powerful magic and/or charisma is involved in any oni army.

Notes

Humans consumed by rage can turn into an oni. But it's unclear if this is how the first oni came to be.

Strengths

Fiercely independent with large ki reserves, it's almost impossible to summon them to do one's bidding.

Built like an ox, not much can stop them.

Weaknesses

Often not the most intelligent. They tend to let a berserker rage speak for them.

Not adaptable. Once set on a task, they don't change direction easily. (Can be a benefit if you need this trait for a task. But in battle this can be deadly.)

Work in Progress

This article will be expanded in the future.

Stub

This article will be expanded in the future.

Definition

This article stub serves as a simple definition.

Public Domain Photograph by Amcaja

Physiology

Arms

2-4

Hair

black or white

Horns

on top of head or forehead common

Average Height

6'5" - 7'9" (195 - 236cm)

Average Weight

325 - 400 lbs (158 - 181 kg)

Body Tint, Colouring and Marking

Vivid colors. Red (most common), blue, green

Rough size info borrowed from D&D wiki.