Athena has always been concerned of the evil roaming around the world, and the increasing amount of crime as well. Having been born with a special psychic power, based on the power of the ressurection bird, the Phoenix, Athena vows to use her powers in order to protect justice, and make evil recoil! However, even the job a justice fighter needs some help. While she was traveling back to home from school, she finds a pair of Chinese fellows fighting against a local tough guy. One of them was about Athena's age, the other was just an old drunkard! Both seem to have problems with the big lug, since they don't seem to take the battle too seriously. Athena, taking away any suspicion, blows the strongman away, and seeing the skills of both men, asks them if they want to be her sidekicks. The young boy, later known as Sie Kensou, accepted inmediately, much in favor thanks to his infinite liking towards Athena, and as for the old man, soon known as Chin Gentsai, well, he decided to tag along as well...

Soon enough, all three began to fight against crime and evil in Japan. Since Kensou also seemed to manage psychic powers as well, the trio was soon to be known as the Psycho Soldiers! All three fought bravely against any evildoear, although most of them didn't pass from your run-of-the-mill criminal or a mob leader.

Meanwhile, Athena decided to continue her studies in high school. She is certainly very attracted to Kyo Kusanagi, one of her classmates, but she decides to leave it alone, since she is also a very good friend of Yuki, Kyo's girlfriend (even though it causes quite a scene of fury from Kensou!). She then begins to hear rumors of the King of Fighters tournament, and soon enough, she receives an invitation to participate. Taking along her sidekicks, Athena decides to show the world what true justice does, and in the meanwhile, fight those who threaten mankind.

During the pass of the tournaments, Athena has grown more mature and responsible in order to keep up with her duties as a justice fighter. She also has to keep up rejecting Kensou, since the young man doesn't seem to understand when to quit proposing himself to Athena! However, after three tournaments, the Psycho Solider team begins to spark more and more popularity among the world, especially among the young people, who are encouraged with the actions of the brave Psycho Soliders. Athena always forces herself to be the best, not pretending to lose the confidence of thousands of young men and women around the world who send her thousands of letters each week! It was even one fan letter from a invalid girl named Kaoru Watabe which encouraged her to enter the King of Fighters '97, competition which she did not accept to enter at first. After all, Athena is fighting for the goodfare of all mankind, so she is always up and ready for the challenge!

After defending justice for so many years, Athena and her Psycho Soldiers got a well-deserved rest for two years...Period of time in which Athena met Bao, an adoptive student of Chin. Athena liked the kid very much, since he was so cute and so friendly. Bao seemed to like Athena very much as well, and since he too, had very potent psychic powers, he decided to take a cue from Athena's psychic techniques in order to get started. However, Athena could not resist her worries about Kensou, who had began to lose his psychic powers for some unknown reason. And so, arrived The King of Fighters '99....

Athena fought bravely along her comrades, but once she realized the real purpose of the tournament, being a set-up by Krizalid, Athena decides to take the bad guy down! However, before Athena and the Psycho Soldiers could arrive to the underground base, there was an explosion, and the passage began to fall down! Athena demanded an escape, but midway through, a heavy rock falls on Athena's leg, and can not budge it free. Another rock is about to fall atop Athena, and Athena faints before it can hit her. However, Kensou, turning on what remained of his psychic powers, manages to rescue her and exits to salvation....

Having barely escaped the hands of death in last year's tournament, Athena comes back in the King of Fighters 2000 tournament, in order to demand justice from the NESTS cartel! This time she has dedicated herself to become stronger and exploit her psychic powers to stand against the evil forces of NESTS. Athena still wonders about what the relation between Kensou and Bao really means, but relaxed by master Chin, Athena is impulsed to dedicate herself completly to the tournament.

After many rounds of fighting, Athena manages to find out that the final battle would take place in Southtown, where NESTS is supposed to hide out. Athena feels a lot more braver, and injects her inspiration to the rest of her companions (although Kensou really doesn't need any words for that). However, upon arriving at Southtown, it is too late. The whole city has been reduced to nothingness, destruction and deoslation spreading everywhere. Athena senses a great deal of withdrawl in her heart, for not having been able to do anything to save the citizens of Southtown, no matter how corrupt they were. However, there are other things to worry about: Athena notices a falling star in the sky, but it's no ordinary falling star...it turns out to be the wrecked Zero Cannon, which plummets to the ground. It is still active, however, and in its' crazy descent, still manages to fire several laser blasts! One of these blasts is directly aimed at the young psychic heroes, and their loyal follower, Kaoru!

With Athena in shock, the young heroine manages to notice her little friend Bao leaping towards the approaching beam. Athena urges Bao not to do so, since he would be risking his life. But it's too late for reason now: Bao has now come intro direct contact with the laser blast, and creates a huge impact, which Bao suprisingly absorbs into his body! This brave doing does not remain without a price, though: Bao falls to the ground, badly wounded. Not even Athena's healing psychic powers are enough to soothe Bao's pain. When everything else seems hopeless, Kensou comes into contact with Bao, and absorbs his psychic powers. Athena is happy now that Kensou has regained his psychic powers, but what about Bao...?

When the new King of Fighters tournament is announced, Athena is faced with yet another dillema: Kensou seems to have regained his psychic powers back to normal, but now it's Bao who suffers from psychic power shortage! Athena thinks it has something to do with the incident last year, when Kensou absorbed Bao's psychic powers last year with the "kiss of life". But her determination to put NESTS away for good this year is stronger than any kind of suspition! Now that NESTS has exposed itself to the public, Athena considers it the perfect time to stop their reign of terror once and for all! With her help, and with her huge psychic powers placed on the ulitmate test, Athena plays a crucial role to defeat Igniz, the CEO of NESTS, and put the evil cartel to an eternal rest, as their space base crashes into the ocean. Athena is glad to see that her friends are safe, and thanks the heavens that no one got hurt this year. But not too far away, two survivors of NESTS brew up a plan which will directly involve Athena and her closest friends in a plot for global domination...

Athena is known to be a very sweet girl among her friends, and very polite too. She is never rude except among gangsters and sometimes, Kensou (whenever he decides to pester a lot). She always helps her friends, and always takes her time to live her life as a normal girl. After all, she has a lot more to live, and life is short! Athena also respects master Chin a lot, although she wishes she will stop drinking for his own health. Being very concerned to where the world is heading to, Athena decides to fight hard for all mankind!