9'β

9'β (pronounced "Nine Beta") is a minor character in Darling in the FranXX.

He is a member of the Nines (9's), an elite special forces unit of Parasites created by Dr. FRANXX and directly controlled by APE. As a stamen (the male pilot role), he is partnered with 9'η and pilots one of the advanced 9 Model FRANXX units.

Like the other Nines, he is a clone derived from Zero Two's genetic material (though without her Klaxosaur blood), and he exhibits the group's typical cold, arrogant, and superior attitude toward regular Parasites. He has light blue hair swept over his right eye and wears a distinctive white-and-gold Parasite uniform.

He appears mainly in the later episodes as part of the Nines' antagonistic role before their involvement in the larger conflict.