9'δ

 is a character in DARLING in the FRANXX.

Appearance
Delta has short, light green hair and eyes of the same color. She wears the standard 9’s uniform, colored white and gold. She is the shortest in stature of all the Nines (with her leader Alpha being a close second, followed by Zeta and her identical pistils all tied for third).

Personality
When not in combat, Delta is quite inquisitive, felinely sneaking her way around Mistillteinn after the members of Squad 13 had already gone to bed (with the notable exception of Kokoro), as shown in episode 17.

When in combat, however, Delta is shown to be very smug, scoffing the klaxosaur battalions of Gran Crevasse as being "boring," although she did admit that "there's no end to them." Of course, all that smugness of hers came to a horrible end when their 9 Model FranXX was decapitated.

9'ε
Epsilon is her FranXX co-pilot, making her the only non-triplet pistil of the current members of the Nines (Zero Two being the only other one before departing for Squad 13). Delta seems to have an attitude of dominance over him, as she's the one speaking to the klaxosaurs as the 6th Wave proceeds to sortie in the Battle of Gran Crevasse.

Etymology
Similarly to Zero Two, she received the name from Papa. Delta is a letter in the Greek alphabet.

Quotes
"How boring. Entertain us more!"

- Episode 15

"'Our own decisions?' Do you guys think you're special or something? Papa's words are absolute!"

- Episode 15

"No! I don't wanna die!"

- Episode 21; Delta's last words.

Trivia
  9'δ