- Nationality: South American (Peru)
- Age: 17
- Height: 155 cm
- Weight: 42 kg
- Blood Type: B
- Occupation: Tribesman
- Weapon: Twin blowguns
Atahua made his first and only appearance in Battle Arena Toshinden 3, as an unlockable counterpart to Ellis, with a similar moveset to her.
Atahua is a South American teenage tribesman who seeks the full restoration of his fallen tribe's ancient empire. Raised on the strong beliefs that his fallen tribe's ancient empire was considered the most powerful in South American history, Atahua had done everything he could in order to preserve the legacy of his people's own historical past.
With the help of his mentor and adoptive father Tau, Atahua had decided to join the Soshiki in the hopes of restoring his tribe's empire through the help of Abel. However, Abel had told Atahua that if he had wanted his long-sought dream to come true, he would have to be an assassin for him and eliminate a certain fighter that was to come to the third Toshindaibukai, of which Abel was hosting.
Within time, Atahua had learned that his target was a teenage girl named Ellis.
Atahua had spent the next few weeks training himself so that he could copy and mimic Ellis' fighting style from point to point. When the third Toshindaibukai had finally arrived, Atahua had confronted Ellis from within their match and battled against her with all of his might, hoping to fulfill his personal ambition.
However, the fight between Atahua and Ellis had came to an unexpected end when Tau had suddenly appeared and told Atahua to forfeit the match. Through the explanation of Tau, Atahua had learned and realized that his ancestors wouldn't have been proud of his recent actions and that the murder of a fighter couldn't justify the means of restoring an ancient empire.
Realizing that his adoptive father was correct, Atahua had agreed with him on his idea and forfeited his match, understanding now that fighting a pointless battle wouldn't grant his own wish. Since the defeat of the Soshiki, Atahua and Tau have gone back to South America so that they can preserve the legacy of their tribe's empire through the right means of method.
- Atahua is the only counterpart that has an opposite gender (Ellis is a female and Atahua is a male and they're both counterparts of each other.)
- Atahua is one of the few Organization members to survive the events of Toshinden 3 (the other ones being Tau, Cuiling, Rachael, and Vermilion).
- His name is likely derived from the last legendary king of the Incas, Atahualpa, whose death is famous for his bail ransom to be paid with the Treasure of the Llanganatis.