Kizao Kiza stands 127 cm (4'2") tall and is a human elementary school classmate of Shota Ohara. He possesses black hair and eyes, along with thick lips and a distinctive "V"-shaped hair bang. His poor vision necessitates rectangular glasses, rendering him practically blind without them. Kizao typically wears a light blue shirt featuring a yellow line and dark green pants. His defining personality trait is proudly flaunting his family's wealth, frequently acquiring new possessions that inadvertently lead to trouble. This behavior is counterbalanced by his submissive relationship with the bully Tsuyoshi Saigo, whom he fears and addresses as "boss." Kizao avoids direct confrontation with Saigo, as force is rarely employed against him despite occasional opposition. He also harbors a fear of heights. Within the Ohara household, Kizao interacts with both human characters and supernatural beings like Q-Taro and Doronpa, relationships stemming primarily from his connection to Shota rather than independent bonds. His acknowledged mother and father remain peripheral figures in his family background. Kizao functions as a foil within Shota's peer group, often enabling comedic situations through his wealth-related antics or reactions to Saigo's intimidation. Across documented media, he exhibits no substantive character development or evolution.