Kazuki Kurauchi is a B-Rank Shooter in the No. 05 ranked Ōji Squad, having transferred from Yuba Squad. He maintains a calm and collected demeanor for analytical thinking in combat, though his expressionless exterior belies emotional vulnerability; he is easily moved to tears by sentimental events or films. As student council president at Rokueikan High School, schoolmates Arafune and Inukai call him "Prez." He possesses extensive knowledge about Triggers, evident during Rank Wars commentary.

He stands tall with brown hair slicked sideways in a center part. During Border operations, he wears Ōji Squad's standard uniform, while his casual attire features collared or collarless shirts paired with open blazers.

Functioning as Ōji Squad's mid-range specialist, he wields Shooter Triggers Hound and Meteor. He combines these to form the composite bullet Salamander, deploying it as a single high-destructive projectile. His combat style emphasizes speed, ranking him among Border's top runners for rapid map traversal and targeting vulnerable opponents. Coordination within Ōji Squad proves particularly effective in open areas due to their shared Hound Triggers.

His personal interests include photography, with some works displayed in the Ōji Squad operator room. He prefers green tea, oyakodon, pickled turnips, and enjoys aquariums. He plans to attend Mikado City College exclusively to study Triggers. Rumors suggest a relationship with student council vice-president Haruka Ayatsuji, which he denies.