Check out the blood type section for information on the various blood types and what they mean in anime. All character names will be listed with given name followed by surname.
Momiji is the quintessential ditzy, friendly young schoolgirl with secret powers. Specifically, Momiji is from the Kushinada bloodline and her blood literally holds power over the Aragami. Though she is frighteningly clumsy, stubborn, and easily flustered, Momiji has a big heart and a great capacity for caring. This is one of the reasons why she makes a more effective Kushinada than her more-clinical twin sister, Kaede. Momiji's name means "maple" and she loves sweet buns. Her blood type is A, her sign is Libra, and her hometown is Izumo.
Koume was originally a Defense Force operative nicknamed "the Hurricane." She was relocated to the TAC against her will, presumably because of her trigger-happy, ball-breaking disposition. Basically, Koume likes to destroy things and isn't too worried about things like "aiming," "property damage" or "lawsuits." Though she is often brusque with those around her, her gruff exterior belies a softer side. Koume does have gentler sensibilities, but mostly she prefers to cover up her fears and doubts with in-your-face bravado. Koume's blood type is B and her sign is Ares. She was born in lower Tokyo.
Ryoko has been working with Director Kunikida for the longest. She takes her career very seriously. She is a great shot and a great team leader, but has a hard time expressing her feelings. Ryoko has several work-related romantic entanglements, including a previous relationship with Sugishita and a budding relationship with her Kunikida. Her attraction to Kunikida isn't surprising, considering her dedication to work and her desire for stability. Ryoko's blood type is AB and her sign is Leo. She was born in Haikado.
Matsudaira is the team's resident scientist and sports several degrees, including one in Biological Chemistry. She is a very calm, quiet, and clinical woman, who predictably values the power of brains over brawn. She is divorced and has a son named Jun who she, like many workaholic mothers, unintentionally neglects. Matsudaira's blood type is A and her sign is Capricorn.
Yaegashi is the resident computer programmer. He's a timid, soft-spoken man that may frequently get left behind in the whirlwind of estrogen that pervades the TAC office. He's a bit of a shut-in and has a lagging love life--as a result, his amuses himself by designing a program that will predict what type of panties Momiji is wearing on any given day. Yaegashi's blood type is O, his sign is Pisces, and he still lives with his mother.
Kunikida is the Director of the TAC and was Kaede's foster father. Kunikida is a somewhat quirky boss. Though he is a good tactician and is reasonably good at getting the team members to work together, he sometimes seems cut-off or separated from the rest of the team. His favorite past time is making up jokes and laughing at them. At times he can be strangely exuberant, while at others he is very stoic. Ryoko is very attached to him, but he seems somewhat oblivious at first. Kunikida's blood type is B, his sign is Virgo, and he was born in Tokyo.
Kusanagi is a highly conflicted person. His loyalties lie in many places--to the aragami, to Kaede, to Momiji, and to the greater good. This conflict makes him cranky. Though Kusanagi can have a teasing, loveable, scoundrel side, he has a lot of anger and resentment and those feelings may come out at unexpected moments. He is cocky and brash when it comes to fighting, but when it comes to the intimate things in life he finds himself unable to open up or relate. With Momiji he is able to open up, and it is through her that we begin to see the real Kusanagi that lurks underneath.
Sakura is a larger-than-life American agent and Shinto priestess who also moonlights as an idol singer. Though she is an incredibly powerful summoner, her real dream in life is to become a rich and famous idol. Sakura is loud, self-absorbed, obnoxious and flirtatious. Like Koume, however, there is a softer side under the glittery exterior. Sakura is highly competitive, and when she isn't competing with members of the TAC to kill Aragami the quickest she is competing with Momiji for Kusanagi's affections. Sakura's Japanese isn't too great, but she makes up for substance with style and perseverance.
Murakumo, like Kusanagi, was charged with protecting the Kushinada by the aragami. He has eight mitamas and considers himself a "perfect soul." He's all for the Aragami race, but he's also an elitist. Kusanagi is an imperfect soul to him and he has little respect or care for lesser Aragami. He wants the Aragami to rule the world, but he wants it his way.
Kaede is Momiji's twin sister and was the original Kushinada under Kunikida's care before her "death." Of all of the characters, her motives are the most dubious. She has been seen in the company of both Murakumo and the child deity Susano-oh. She is intelligent and analytical and, in her most recent incarnation, often seems cold and uncaring. Is it better to serve in heaven or rule in hell? Kaede appears to have chosen the latter.
Sugishita is the Director of the 26th Department of Public Safety and he occasionally acts as a liaison between the police and the TAC when he's not making passes at Ryoko. At first glance he seems to be nothing more than a charming, girl-crazy bachelor, but don't be fooled--there's an investigator in there who wants the aragami put to rest. Sugishita's blood type is B and his sign is Scorpio.