Kazuki Ōgami is a young man possessing long, dark turquoise hair and dark ochre eyes. His attire typically consists of a priest's outfit or a dark kimono, reflecting his story role. He maintains a calm and collected demeanor, frequently showing concern for others. This concern specifically involves Sōma Ōgami's connection to the Orochi bloodline and the burdens carried by the priestesses Himeko Kurusugawa and Chikane Himemiya. Indications suggest he may not fully disclose all relevant information about these situations.

He first appears stepping into Sōma's room for a conversation in the opening episode. Later, he witnesses Sōma's initial transformation into an Orochi manifestation, reacting with shock. In the second episode, he adopts an expository role, revealing to Chikane and Himeko their identities as the reincarnated solar and lunar priestesses while also explaining Sōma's Orochi connection. Following this revelation, he provides the priestesses with their ceremonial miko attire and assists in their subsequent training.

His name, Kazuki (カズキ), is written in katakana.