Darling in the Franxx is my personal favorite
anime, but the ending is very depressing and made me very
sad. As it is described: "The survivors of a catastrophic
war against monsters cluster inside mobile fortress cities and
train youngsters to defend humanity by piloting large battle robots called Franxx." The characters in the show are called "parasites" since they were made and developed in a
lab. The characters in the show also go by codes/codenames since names are no longer needed in this "timeline" that they are in. The "main characters"/the parasites from Plantation
13 go by: Codename: 002 (or Zero Two), Codename: 016 (or
Hiro), Codename: 015 (or Ichigo), Codename: 666 (or Zorome), Codename: 556 (or Kokoro), Codename: 214 (or Futoshi), Codename: 056 (or Goro), Codename: 390 (or Miku), Codename: 326 (or Mitsuru), Codename: 196 (or Ikuno).