Negative (zero two X male reader)

Code: -1 is the only known negative code. He made a promise to someone long ago. When he got taken as APE's most elite pilot he found a way to fulfill that promise. Earning information by killing Klaxosaur

Disclaimer: I don't own any of the characters from darling in the franxx or any art/music I may use. I only own this story and the reader's character