9'β

Nine Beta often does not say much and lets his team leader 9'α speak on behalf of the 9's squad. In Episode 17, Nine Beta is shown to be aware of his surroundings as he commented the ruined state of Mistilteinn was not a good place for parasites. In Episode 22, Nine Beta is shown to be willing to fight to his death when he, along with Alpha and Gamma, offered to come with Squad 13 to fight the final battle against VIRM. This was further demonstrated when he and Gamma went on 'a blaze of glory' in Episode 23 to take out a huge number of VIRM soldiers, where he met his demise.

Nine Beta has light blue hair swept over his right eye, and grey eyes. He wears a special Parasite uniform emblazoned with white and gold, instead of the typical gray uniforms that other Parasite squads use. When in his FRANXX, Beta, along with the others in his squad, sports a red battle suit. Like his fellow stamens, he appears with golden horns that appear to be holographic klaxosaur horns.