Delphinium Franxx is not a human character, but rather the code name of one of the mecha, or FRANXX units, in the anime series 'Darling in the Franxx.' Piloted by the pair Ikuno and Mitsuru, Delphinium plays a significant supporting role in battles against the Klaxosaurs. The mecha's design is notable for its blue coloration and spear-like weapon, reflecting Ikuno's calm and precise fighting style. Delphinium is essential in team missions and symbolizes trust and cooperation between its pilots.