FRANXX

FRANXX are armor and control systems created by Dr. FRANXX to combat Klaxosaurs, usually piloted by children in boy-girl pairs. Those who can pilot FRANXX are called Parasites.

All FRANXX units are at the disposal of APE, the governmental body of this world.

The FRANXXs feature certain similarities to the flowers after which they were named.

FRANXX
FRANXX units are bio-mechanical weapons built by Dr. Franxx and under the supervision of APE. They were built from klaxosaur skeletal remains that were excavated from Earth’s surface through a drilling process called S-Planning. They were pecifically designed as defense arsenals against the klaxosaurs and are required for fertile male and female pilots to pilot. In order for the Parasites to connect with their FRANXX, each pilot has to first undress, put on a special underwear, and then change into a suit. The Pistil takes over the FRANXX while the Stamen maintains the control manuals. Every damage the FRANXX gets will be shared with the Pistil. When the paracapacity is low, only the female seems to get exhausted while the Stamen does not feel the stress. Therefore, they need to communicate verbally and maintain a network of trust between them in order to maintain a successful sychronization. Upon sychronizing, the Parasites connect their "minds" or to some sort of extrasensory level. The surrounding environment and the faces of the participants in the communication can be projected on the walls.

The FRANXX used by Cerasus differ from typical FRANXX as they each have individual and unique designs befitting of their users. This is most likely because Plantation 13's Parasites are considered special experiments due to that they were hastily thrown into the squad out Dr. Franxx’s curiosity of humanity’s previous emotional and reproductive instincts. As shown in Episode 6, the other Plantations have identical FRANXX units, suiting their blank-slate personalities. The 9's have custom made FRANXX units. The facial expression of the FRANXX captures the emotion of the Pistil including happy, angry, exciting and sad.

The FRANXX of Plantation 13 have specific colors that the pilots also wear to distinguish their psychological influence. Strelizia has red, which symbolizes excitement, danger, and passion to reflect Zero Two’s rebellious streak and dark past, the intense love she and Hiro share; Delphinium has blue, which symbolizes trustworthiness, leadership, and loyalty to reflect Ichigo’s status as Squad 13’s leader and the close relationship she shares with Goro; Argentea has pink, which symbolizes playful, immature, and adoring to reflect Zorome and Miku’s frequent childish quarrels as well as Zorome’s immaturity and Miku’s need to be cute; Genista has green, which symbolizes growth, dependability, and fertility to reflect the maturity of Kokoro and her relationship with Mitsuru and Futoshi, and Kokoro and Mitsuru’s promise to trust each other and their desire to have a family; Chlorophytum has purple, which symbolizes creativity, sensitivity, and mystery to reflect Mitsuru and Ikuno’s conflicted emotions and Ikuno’s secret feelings for Ichigo, and Futosh’s inspiration to do his best after the partner switch.

Parasites
Parasites are children who are trained and tasked with piloting the FRANXX with the sole purpose of protecting the plantations and the adult population from the klaxosaurs. The male parasite is the Stamen and the female is the Pistil.

The 9's are capable of battling as either Stamen or Pistil, as explained by 9'a to Hiro in Episode 23: DARLING in the FRANXX.

Below are the names of the current Pistils and Stamen of Plantation 13.

Stampede Mode
Stampede Mode (スタンピード・モード) occurs when a pilot loses control of his or her FRANXX. When a FRANXX is controlled by only its Pistil, their negative factor will rise rapidly and the FRANXX will take on a more beast-like appearance. This will negatively affect the Pistil's health if continued for long periods of time.

This phenomenon is first shown with Strelizia. After 081 dies, Zero Two is forced to pilot alone, transforming it into its beast mode. When Mitsuru refuses to fight and Kokoro tries to pilot Genista alone, the lip of Genista's hat opens, revealing sharp metal "teeth" and two orange crosses for eyes appear, making an animal-like face.

Paracapacity
Paracapacity (, Para Kyapashiti) is the numerical value indicating the degree of synchronization between FRANXX pilot and their FRANXX. There are three levels of paracapcity: high, median, and lower range. The higher the paracapacity, better of a successful synchronization between the pilots. If a pair’s paracapacity falls in the lower range, they are given the option of a “partner shuffle”, or switching partners. If one pilot is deemed the cause of the low paracapacity, he or she will be the target of “pruning“, or will be deemed unfit to pilot and permantly removed.

FRANXX