Used to dedicated and extremely powerful soldier. However the war and the errors her superiors have made caused her to leave the army and resign her rank. After she left, and the nation of Gensokyo formed it's government under the Party of Scarlet, she met and associated herself with Corporal Hakurei Reimu.
Ironically, Brig. General Yakumo Yukari abhors the use of firearms, and because of her refusal to wear one to her side, as required by the uniform regulations, she was demoted from Major General to Brigadier General. She is known for her ability to manipulate boundares, which has made her known and feared slightly.
Her true power lies in the gaps and portals she makes, which made her most used for reconissance and counter-insurgancy, as well with just about any forms of behind the scenes work, such as assasinations. That is the very reason why she's feared by anyone she holds a grudge against, and by anyoe who happens to be on a different side than her, she is also known for her unpredictable, almost impossible swordsmanship ability, which is basic kenjitsu mixed with the carefully analyzed swordsmanship styles of all her past foes, which she can switch between at a second's notice.
The Yokai of Boundaries, supreme leader of the Celestial Bureaucracy faction, and occasional care taker of Hakurei Reimu. Yakumo Yukari holds almost unlimited power in both her station and her abilities. She is a being that is impossible to understand or read and she uses her ambiguity as her strongest weapon.
A being of indeterminate but ancient lineage, as far as anyone can remember, Yakumo Yukari has existed in Gensokyou, and from the admissions of several "old Maids," she seems to predate it. She personally knows Saigyouji Yuyuko, the administrator of the dead, as well as Ibuki Sukia, the Don of the Oni. In her personal retinue she had her personal servant, the nine tailed Fox yokai Yakumo Ran, whom herself has a familiar, the nekomata Chen. Such a nesting doll like situation of Familiars truly shows the scope of Yakumo Yukari's power.
Yakumo Yukari's signature power is the manipulation of Boundaries and Borders, an ability that is as powerful as it is vague. She has been documented in several instances of ignoring laws of science, magic and even basic common sense in her application of her powers. The most sundry of her exploits is manipulating the border of earth and sky to fly, as well as the border of Here and There to teleport using strange gaps, that appear to be tears in reality filled with a hazy purple space lined with open, unblinking eyes. But the most well known of her exploits of her powers was manipulating the border of truth and falsehood to turn a reflection of the full moon on the surface of a lake into a portal directly to the lunar capital. Yakumo Yukari is also skilled in the use of gateways, using the same "gaps" she uses to move about, Yakumo Yukari can actually use these gaps to momentarily, breach the barrier surrounding Gensokuyo and pull in items to assist from the outside world. Mostly these are items she likes to break out in combat to catch foes unaware.
Aside form her innate power, Yakumo Yukari is also, bar none, the strongest magic user in all of Gensokyo. A master of Onmoyodo, divination, boundary and reshaping magics there are few who could be considered peers to her in the realm of the mystic arts. It is rumored that it was she who initially laid the ground work for the Great Barrier as well.
Threat assesment: CQC: Phantasm Melee: Phantasm Short Range: Phantasm Medium Range: Phantasm Long Range: Phantasm Spell Card: Phantasm
Analysis: Yukari is one to appear in battle as she so deigns to decide, as such, there are no known standing orders or counter-tactics against her, with the exception of a general retreat order if one hears a massive horn blast from out of nowhere.