Teruaki Kubota

His bracelet number is 9. When the Nonary Game began, Kubota was very quiet and reserved. Kubota was cowardly and Junpei remarked that Kubota "had only a fingertip's-worth of a grip on his sanity." He was initially quiet, not speaking at all until interrogated about his bracelet. He then remarked that he had a plan to escape and began ordering everyone around. Whenever he did talk, he had a nervous stutter and was fidgety.

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He also did not care about the other players as he said he wouldn't hesitate to kill Clover if she didn't cooperate while holding a gun to her head.

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He became the first victim of the Nonary Game very early on. By entering Door 5 alone which he achieved by betraying the other players, he violated Zero's rules, hence activating the small bomb lying in his intestine and resulting in his gruesome death.

(Source: Zero Escape Wiki)