— Miko to Sora, Rule Number 10
She has long golden hair, fox ears, whiskers, and two golden tails. She typically wears a kimono and a monocle. She also has a giant bell on her chest. Sora had hypothesized Miko's age to be at least 58 years old, but her true age remains unknown. Despite her true age, Miko holds the appearance of a woman in her 20's.
She usually has a smile on her face in many situations, showing her confidence and knowledge. She is also very affectionate towards her people as she told Sora to take care of the Werebeasts if she would lose the coin toss. She, like many other races, used to look down on Immanity. However, she begins to respect them after the alliance, particularly Sora and Shiro. Her respect for Sora increases when she sees his determination and intent on saving Ino and winning the game by another method with no casualties, while she herself believed sacrificing Ino was the best and most efficient solution.
Intellect: She is second to none among Werebeasts when it comes to strategies and political manipulation, being able to almost singlehandedly end thousand years of Werebeast civil war and build the third largest nation on Disboard, the Eastern Union. She's also able to grasp 『 』's plans intuitively.
Blood Break: Her mastery of Blood Break is said to be the highest among Werebeasts. Upon activation, she was able to detect all movements and flow of magic within a range of 500m, as well as predicting the result of a coin toss through all possibilities and factors. She was also capable of briefly running on water (despite Werebeasts' bodies are much denser than Immanity), as well as detecting lies while withstanding the pressure from 200m underwater.
Also, being Blood Break capable individuals, she ages very slowly.
Using Blood Break greatly strains her body. After using Blood Break, she briefly becomes fatigued, to the point of having trouble standing.
Miko had to spend at least 50 years to unite the various Werebeast tribes into what is currently the Eastern Union, in which she lost her original name in a bet and gained her title as she contacted a certain Old Deus. As the leader of the Werebeasts, she was responsible for the expansion of the Eastern Union and thus played games against the Immanity (8 times), the Elves (4 times), and the Flügel (1 time), although it is unknown whether she played the games herself or sent a representative in her stead. The Werebeasts were once known for never challenging other races in games, but always being victorious when challenged.
Later, after the siblings had won over all the lands the Werebeast claimed on the continent, Miko challenges them to a game match, which was decided as a coin flip. Circumstances made a tie favorable to simply winning the coin flip, and thus the Eastern Union formed an alliance under Elkia and named it the Commonwealth of Elkia.
As of Light Novel Volume 7, she bets her life as part of the bet in the dice game against the Old Deus.
“Can you not just blow your usual load of malarkey at her to make her fall for you? Isn’t that precisely what you frauds are good at?” - fourth Light Novel