The daughter of Zenithman Infinity, Natsuki Hanamura is a young woman with relatively minimal combat experience who possesses a unique, powerful genetic mutation known as the “Phoenix Heart”, which grants her significant supernatural abilities similar to those of the mythological Phoenix. 

She possesses this genetic condition due to her father, who also possesses the Phoenix Heart mutation and has possessed it since birth. However, neither Natsuki nor her father knew of their mutated condition until events that allowed for the full awakening of its powers in both Cecilia and Infinity alike sometime within the last 1 to 2 thousand years. 

As for Natsuki, she takes pride in being the daughter of one of the famed Zenith Elite, a trait portrayed as enabling experienced enemies to provoke and manipulate her into making mistakes, as her desire to prove her combat skill as equivalent to those of other descendants of the Zenith Elite, such as Zenithman Zegon, is often enough to enable a psychological opening for manipulations.