Delphinium

Delphinium (デルフィニウム) is a FRANXX from Thirteenth Plantation piloted by Ichigo and Goro. It is the leader of the FRANXX platoon of Thirteen Plantation.

Appearance
Delphinium has light blue eyes, while a red fringe covers her right eye, this is a reference to the straight razor-cut hair that covers Ichigo's right eye. Delphinium has three deep blue fins on the top of its head, and it wears a white and pale blue helmet over it. The chest area of Delphinium is mainly pale blue with a red and orange crest in it. Its torso contains many shooters, colored white and deep blue. There are two red and blue stripes on its right leg, and its feet are designed to resemble pumps. Delphinium's pointy arms, which are shaped similarly to guns, contain the orange magma-energy weapons it can use to defeat the Klaxosaurs' cores.

History
Delphinium is first connected and activated during the startup ritual. Nana assigns Delphinium as the leader of the platoon. After all the FRANXX robots come out of their stations, Delphinium saves Argentea from tripping and falling down to the ground, who was having an argument over its two pilots.

Later on, Ichigo decides to pilot Delphinium with Hiro during the mock battle which will decide if Hiro can become an official Parasite or not. Hiro and Ichigo successfully connect Delphinium, and are ready to fight their mock battle opponent, Argentea, but it suddenly stops moving and deactivates. Inside Delphinium, a worried Ichigo ponders how Hiro was able to pilot Strelizia and how she can prove that Hiro can pilot Delphinium too. Hiro remembers that he was kissed by Zero Two before connecting and activating Strelizia, and believes that a kiss from Ichigo will also help Delphinium re-activate. They kiss but Delphinium fails to activate, frustrating Ichigo to activating Delphinium all by herself and defeat Argentea, who was almost about to defeat the former mecha. Both Delphinium and Argentea are knocked out in the process.

In Episode 3, Delphinium is piloted by Ichigo and Goro to go in a Klaxosaur mission deep underground in Level 8. However, the magma-energy of Delphinium and the other FRANXX robots attract many other Klaxosaurs. After fighting all of them at once proves to be dangerous for them, Delphinium decides to escape the area, but Kokoro (as Genista) realizes that there are many more Klaxosaurs surrounding the area. Ichigo starts to get pressured and stressed as Goro finds himself struggling to control Delphinium because of this. The three of them continue battling the Klaxosaurs until Strelizia arrives to rescue them.

In Episode 09, while facing a Gutenberg-class Klaxosaur, Argentea finds the Klaxosaur's core and attempts to destroy it, however it gets stuck in the sticky gelatinous body of the Klaxosaur. While Delphinium tries to save Argentea by pushing them out of the Klaxosaur, this caused Delphinium to be stuck instead. After that, the Klaxosaur exploded itself, causing Delphinium to be swallowed inside its body.

Goro later wakes up alone inside the FRANXX without Ichigo, it was then revealed that Goro used the emergency pod to eject Ichigo out of the FRANXX before the moment the Klaxosaur swallowed the FRANXX and explode. Hiro finally gets contact with Goro and explained to him that he was inside the Klaxosaur and telling to him that Hiro and the rest were forced to retreat back to the Plantation.

Ichigo later came back mad into hearing that Goro was stuck inside the Klaxosaur and causes her and Miku to argue about it. This argument soon was later then cooled off by Nana. Hachi later then explains about the Klaxosaur's analysis which claims it has the ability to vaporize fluids to expand and explode. Ichigo contacts Goro and was greatly frustrated to him for letting himself swallowed by the Klaxosaur and tells him that she will try to save him. While Goro tries to calm her down by claiming to destroy the Klaxosaur. Ichigo pleases Hachi to save Goro, however Nana asked how will she save him, at the moment Zero Two explains that the Klaxosaur contains an exhaust hole on the top of it.

15 minutes later, Strelizia carrying Ichigo in the palm of its hands heads over the Klaxosaur along with Argentea. Strelizia jumps into the top of the Klaxosaur and drops Ichigo in the exhaust hole of the Klaxosaur. Ichigo manages to swim over Delphinium and finds Goro inside of it. The two have finally activated Delphinium before leaving an explosive device and made their escape, ultimately destroying the Klaxosaur.