Theta Hassoku

Theta is highly intelligent and confident in her scientific abilities. The Solar Mass regards her as a genius, giving her substantial responsibility within the organization's research structure.

Her curiosity is directed particularly toward Zolar and the unusual phenomena connected to his legacy. She approaches subjects that others regard with religious awe through experimentation and analysis.

Theta is a parasitic human being rather than an ordinary human. Her principal established strength, however, is intellectual: she possesses extensive scientific knowledge and specializes in investigating Zolar.

As head of her research division, she has access to the Solar Mass's laboratories, accumulated information and experimental technology. Her work involves studying phenomena and artifacts whose operating principles remain obscure even to the organizations possessing them.

The complete biological capabilities associated with Theta's parasitic nature have not been fully defined.

Theta enters the manga when its attention returns to the Solar Mass and begins examining the deeper history behind the organizations pursuing the Hateful Four.

Her research division investigates Zolar, whose technology and legacy have influenced both the Solar Mass and the Lighthead Order. This makes Theta important to the gradual shift from straightforward pursuit of Sanko's bones toward questions about the ancient forces underlying the setting.

Inazuma Dokuhebi is Theta's fellow researcher within the Solar Mass and shares her work on Zolar.

Zaha Sanko and the mysteries surrounding him become relevant to the broader research conducted by the Solar Mass.

Hajime Damemaru is another figure whose unusual nature intersects with the mysteries investigated by the organizations studying Zolar.