Base of Operations: Tokyo, Japan; Millennium City, MI. USA
Group Affiliation: current deputy leader of the Squadron Dark
Motivation: Responsibility of Power
Abilities: The subject has the mutant ability to accelerate, retard, or manipulate natural chemical reactions in both objects and living beings. The subject has also used this ability on herself, granting her limited super-strength, speed, durability and resistance to injury temporarily. The subject has recently developed the ability to transmute inanimate objects on the atomic level within a radius of approximately ten meters though the transmutation lasts for 60 seconds only.
Skills: Master of many styles of unarmed combat, expert in the use of ranged and melee weapons commonly employed by the Ninja such as the shuriken (手裏剣, throwing star), the kusarigama (鎖鎌, chain-sickle) and the katana (刀, sword), fluent in Japanese, English and French, fluent in Japanese and American Sign Language
Vulnerabilities: Due to an injury sustained in her teens, the subject is mute and must use a speech-generating device such as the microvoder unit invented by the Yamashita Foundation to produce speech.
Threat Level: Beta
Keiko Yamashita (山下恵子) grew up among the rich and powerful of Japan. She never wondered why her father – Koichi Yamashita (山下光一), exporter of tea and spices – could command such respect from the movers and shakers of Japanese society or why he was always flanked by dangerous-looking “uncles” wherever he went. She learned the terrible truth about her father at the age of fourteen when her mother, a sad but beautiful woman named Mitsuki (美月), was shot in the head while tending her garden in their estate outside Kyoto and she was kidnapped.
Keiko listened intently to her captors’ often lewd conversations for any information that could help her escape the dark, filthy room in which she had been imprisoned. What she pieced together during her week of captivity, however, shook her to her core – the humble, soft-spoken man that she adored was in fact the kumichō (組長, family head) of the Yamashita-kai (山下会), one of the most feared crime syndicates in Japan. Her abduction had been engineered by his younger brother Koji (光司) to force her father to step down as head of the crime family in his favor.
The brothers agreed to meet in a neutral location for the elder Yamashita to relinquish his position and retrieve his daughter. The price of his daughter’s safe return was his death by seppuku (切腹, ritual suicide), which would guarantee that Koji would succeed him as head of the clan. Koichi, however, had no intention of honoring the agreement and had hired the assassin known as Shinobi (忍び) to kill Koji during the meeting at the first opportunity. What ensued was a bloodbath that left both brothers and their entourage dead but not before Koji had slit Keiko’s throat, severing her vocal chords completely and nearly killing her.
Feeling responsible for her being alone in a brutal world, Shinobi took it upon himself to protect Keiko and train her how to protect herself should he fail in his duty. A year later, her mutant ability to manipulate chemical reactions manifested, which she took to be a sign that she was to atone for the crimes of her father. She used her family’s vast wealth to found the Yamashita Foundation, an organization aimed at bettering humanity through science but she would also use her powers to protect those criminals like her father would prey upon as the super-heroine Catalyst.