The Franxx pilots' names are all designated after Japanese words for numbers:
Zorome, who is designated 666, stands out as his name is Japanese for "repdigit", a number that is the same (11, 22, 33 etc).
- Hiro is designated 16 ("hi"-"ro", 1-6)
- Ichigo is designated 15 ("ichi"-"go", 1-5)
- Goro is designated 56 ("go"-"ro", 5-6)
- Miku is designated 39 ("mi"-"ku", 3-9)
- Kokoro is designated 556 ("ko"-"ko"-"ro", 5-5-6)
- Futoshi is designated 214 ("fu"-"to"-"shi", 2-10-4)
- Mitsuru is designated 326 ("mi"-"tsu"-"ru", 3-2-6)
- Naomi is designated 703 ("na"-"O"-"mi", 7-0-3)
- Ikuno is designated 196 ("i"-"ku"-"no", 1-9-6 - it's actually a Japanese pun as "ku" is turned around to read "no", just as 9 is turned around to read 6).
Zorome, who is designated 666, stands out as his name is Japanese for "repdigit", a number that is the same (11, 22, 33 etc).
The Franxx mecha (Strelitzia, Delphinium, Argentea, Genista, Chlorophytum) are all named after wild flowers.
Studio Trigger's second anime television series to be dubbed into english by Funimation after Space Patrol Luluco (2016).
Creator Atsushi Nishigori also worked as the lead character designer for the series Gurren Lagann