Dr. Franxx

Since he was young, Dr. FRANXX had been pragmatic and immoral, as he cultivates illegal experiments toward cloning involving human fetuses purely to satisfy his curiosity. By his own admission, he was enslaved by his lust for knowledge and doesn’t hesitate to use brutal and abominable methods to achieve his scientific goals. He was very meticulous in his work and was very protective of it to the point he was furious if someone were to enter his lab without permission. As an atheist, he did not believe in deities and finds immortality to be a nuisance. When asked if he planned to have the procedure to become immortal, he declined because he preferred not have his body messed with and found a cyborg version of himself more favorable. He rarely interacted with others due how invested he was with his research, facing ethical scrutiny for its immoral and illegal conduct. However, after working with Karina Milsa for several years and hearing her confess her feelings to him, he eventually reciprocated them despite insisting she had bad taste, and they planned to marry before her death during a FRANXX drill. Her death emotionally broke his mentality; he stopped caring about the future and humanity, and poured all his focus into the study of klaxosaurs and the development of the FRANXX and its parasite pilots. He was also adventurous and can never stay in the same place long, and always looks to have a front-row seat when there is a big battle. After encountering 001, he found her beautiful and alluring, and, despite losing an arm to her aggressive nature, he remained madly in love with her, a fact that he contributes to him losing whatever humanity he had left in him. After obtaining a DNA sample from her hair, he sought to create the perfect specimen and thus created Zero Two, an experiment he takes great pride in. He also is credited for creating all the parasites, who are nurtured and trained since birth to become pilots and fight against the klaxosaurs. His fascination with science and his creations tends to have a bizarre effect on him, to the point he refers to Strelizia as beautiful. As an old man, he had the nature of a calm individual, with a lecherous streak, as seen when he groped Nana. He takes pride in how beneficial his creations prove to be, but he does seem quite disinterested in the formal procedures, such as when he was asked to attend the ceremony and he reluctantly agreed. He had a shaky relationship with APE, whose ideals on human physiology he strongly disagrees with. He tends to carry out his experiments without approval or knowledge of the APE council, saying the "geezers" would never understand what he was trying to discover, some of his decisions are counter-intuitive, as his decision to stop injecting yellow blood cells into Hiro to observe how Hiro will develop shows that his way of thinking is different from others. He also shows extensive interest in uncovering humanity’s precious emotional and reproductive system before humanity turned to immortality. He pursues this by hastily arranging placing the members of Squad 13 together and giving them more liberation than most parasites to allow them to naturally develop emotional and physical effects that come with transitioning from childhood to adulthood, although this impulsive act was solely for the purpose of science. Dr. FRANXX suspects that APE’s doctrines and control over the children are hindering their performance and the introduction of natural hormones that come with adolescence is the cornerstone to piloting a FRANXX. He even admits he received data far more compelling than he anticipated, as he observed the children lean on one another to survive, become self confident in their own choices to the point of rebeling, and develop intimate relationships, one of which resulted in a pregnancy and the pair having a wedding ceremony. Although he was the creator of all the parasites, he merely sees them as expendable specimens and shows them no empathy. He did tend to spoil Zero Two on the grounds she was specifically designed to operate Star Entity on behalf of the human race. He also shows great interest in Hiro for being the only stamen to have survived riding with Zero Two more than three times. When Hiro learns it was Dr. FRANXX who erased his and Zero Two’s memories as children, Hiro said he could never forgive him for everything he did to her, from then onwards, Dr. FRANXX began to regret how he treated Zero Two and the other parasites. Before his death, he decides to make things right by helping Zero Two rescue Hiro from 001 and made peace with her. Moments before his demise, he was allured by how beautiful Strelizia Apath was.

He had the appearance of an older man, sporting grey hair and a mustache. He normally wears a white coat similar to the other adults in the setting, along with white gloves, and he also uses a cane. Half of his face, his entire jawbone, thumb finger, index finger, and middle finger of his right hand are mechanical. Part of his new left arm is blue in color as it contains 001's DNA. In the past, he had unkept black hair that almost reached his shoulders and his bangs covered the left side of his face. He also has a thin beard and still wears the same white lab coat and no cane. He lost his arm when he first met 001.