TV-Series
Description
Dean Kōchaka serves as a deputy shopkeeper at DewYaMart while simultaneously gaining recognition as an online celebrity known for discussing Bottleman topics. His appearance features black hair, perpetually closed eyes, a dark green hoodie, a blue apron bearing a white rectangle logo, and a white cap with a red splash-mark logo.

He first appears visually in Episode 18 without dialogue, debuting his speaking role in Episode 20. His most significant contribution occurs in Episode 39, where he assists a group of Bottle Battlers in hijacking a broadcast. During this event, he transmits a rallying message challenging the antagonist Team Citrus and its leader, directly aiding the protagonists' resistance. This action positions him within the Bottleman Association's support network during its conflict with Team Citrus, and he also provides announcements on the association's behalf.

The character is based on Yuta Kosaka, a real-life producer for the franchise, explaining his name's derivation from "Kochakaden," a Japanese black tea brand.