Momiji is the primary protagonist of the series. She is the descendant of the "Kushinada" who actually lives in Izumo where Princess Kushinada lived. An eighth-grade student in middle school, she was unprepared to understand her destiny to battle the Aragami. She becomes a member of the T.A.C. in order to stop the Aragami from destroying humanity and the world. An ironic twist of fate has Momiji carrying a mitama—an Aragami "soul"—embedded in her chest. At awkward times, Momiji is the recipient of panty shots and jokes about the type of panties she wears. Her relationship with Kusanagi takes a turn for the better during the shielded town incident, where she finally confesses her love for him, and he in turn tells her to wait for him. (Source: Wikipedia)
Koume wears a pink jumpsuit, but never acts feminine. She is loud, brash and aggressive due to her stint in the Japan Self-Defense Forces. She was discharged by the SDF and transferred to the TAC as a result of insubordination. Her philosophy is based on the "bigger gun" theory and uses her military mind and muscle to destroy the Aragami. Despite her tough exterior, she is a vulnerable woman who wants to give her love. She has a soft spot for puppies, enjoys playing matchmaker to Momiji and Kusanagi.
The stereotypical computer nerd, Yaegashi does computer analogy for the TAC. On off days, he enjoys hentai games on his computer. He also has a program that pinpoints the Aragami's weak points and attacks, but it doubles as a program to predict what animal would appear on Momiji's panties. He has a love/hate relationship with Kome through most of the series.
Daitetsu, or Mr. Kunikida, is the Chief Director of the TAC. When Kaede and Momiji were born, Mr. Kunikida raised Kaede like his own daughter, but he exploited her ability to track down and kill the Aragami. However, when Kaede sacrificed herself, he felt heartbroken. With Momiji in the TAC, Mr. Kunikida decides not to exploit her abilities like he did with Kaede and instead treated her like a normal girl. Source: Wikipedia
A former member of Tokyo Metropolitan Police, Ryoko uses her police instincts to help the TAC. Ryoko uses her standard police issue weapons in conjunction with weapons modified to be used against the Aragami. She is in love with Kunikida. Source: Wikipedia
Once the Aragami had reawakened, they began to take steps to ensure their continuted survival. With that in mind, Orochi sought out a family that had been attempting to sacrifice the Kushinada and put the Aragami to sleep again. Orochi killed the parents...but for their baby son, Orochi had a special plan. Implanting within him seven mitama, seven Aragami souls, Orochi charged little Mamoru Kusanagi with the task of watching over the Kushinada and ensuring that no harm would come to her...until they were ready. So even as he grew, Mamoru kept a watchful eye over little Kaede Kunikida, watching her grow and develop. He didn't know it then, but watching Kaede grow like this would stir up emotions later on he would have trouble controlling. For Kusanagi was not happy with his destiny. He sought freedom, and to do that, he thought, he would have to kill the Kushinada and let the pulse lock his masters in sleep. Mutated as he is by the seven mitama on his body, green blood flows in Kusanagi's veins, and he has the ability to transform his body somewhat. He can make blades sprout from his arms, and he has incredible physical ability, including his penchant for long and high jumps. However, without an eighth mitama, he lacks the strength or the abilities to take on Murakumo. But Kusanagi is not one to give up easily, and his unusual connection to Momiji (she and he both received their mitama from Orochi) will play a crucial role in the late stages of the conflict. As his name implies, "Mamoru" means protector, while "Kusanagi" comes from "Kusanagi-no-tsurugi", the Grass-Cutting Sword, a blade supposedly given by the Japanese gods to the emperor. -taken from Absolute Anime