Description
Karita Hazuki, also known as Hazuki Karita, was a former Olympic judo competitor recognized for his world-level skills. He possesses a very tall, extremely muscular build with rough features and typically wears his judogi. His first name "Hazuki" refers to the eighth month in the former Japanese lunisolar calendar, roughly September, but he dislikes being called by it, perceiving it as feminine.

Unlike most participants in the survival project, Karita was informed by his parents about the cryogenic preservation plan and voluntarily entered the program after bidding farewell to his family. His personality combines physical reliability with emotional vulnerability; while not highly intelligent, he occasionally offers simple solutions to complex problems and serves as a dependable pillar for his team, especially for physical tasks. However, he lacks a strong will and is easily manipulated. His most notable weakness is a severe fear of heights, contrasting his formidable physical prowess.

Karita's group entered the new world three years prior to the series' main events, eventually settling in the Kansai region. Within Team Autumn, he initially submitted to Akio and Ran's harsh leadership, which enforced strict rules including a ban on sexual relationships to defy repopulation. During this period, Karita actively restrained Arashi and Semimaru when they were accused of theft. He later witnessed Izayoi's attempt to poison the team's water supply, thwarted by Semimaru.

When Kurumi became pregnant—violating the rules—and refused to abort, Akio and Ran sought to kill her, causing a schism. Izayoi, Kurumi, Ryuusei, and Akane fled. Karita struggled between loyalty to the leaders and his desire to help Kurumi, secretly providing food to her group during their refuge in the Ryugu Shelter. During a shelter collapse, Akio and Ran abandoned Sakuya, though the team later reunited with Hana's group and collaborated to escape.

After Izayoi died shielding Ran from Ango's gunfire, Karita wrestled Ango down but retreated under threat from other armed Summer A members, prompting Akio and Ran to reconcile with their team. Karita sustained a severe injury when his ear was partially torn off during an attack by White Piranha Bats amid a hostage exchange plan involving Team Summer A. Team Autumn subsequently relocated to Summer A's base.

When Hana went missing and Ango's attempted rape was exposed, Karita supported Akio's expulsion of Ango and Ryou. Influenced by Hana's earlier appeals, he committed to protecting his female teammates. Following a forest fire that destroyed Summer A's camp, Karita and his team were forced to migrate again. Throughout these events, his role evolved from enforcer to protector, reflecting his internal conflict between obedience and compassion.