Ken Sakoda operates as a low-level yakuza member within the Ginsekai group, directly serving Sakyo Furuichi, whom he calls "aniki" or "boss." His appearance features blond hair with a dark undercut, chestnut-brown eyes, and a small X-shaped scar near his right eye. He favors distinctive attire: a purple jacket with leopard print, a red t-shirt, black baggy pants, and multiple gold chains.

Originally a directionless stray, Sakyo discovered him and brought him into the yakuza. Within the organization, he formed a close brotherly bond with Azami Izumida, the Ginsekai boss's son. Sakoda displays fierce loyalty to Sakyo, assisting in tasks like attempting to demolish the Mankai Theater with a bulldozer under Sakyo's orders. After Sakyo joins the Mankai Company, Sakoda becomes a frequent visitor to the theater and dormitory, gradually familiarizing himself with the members and taking on occasional errands or support roles.

His personality is energetic and dog-like in devotion, an eagerness that sometimes annoys Sakyo. This loyalty extends to Azami; Sakoda helps him escape his father by introducing him to the Mankai dormitory and later defends Azami's dream of becoming a makeup artist against the yakuza boss. This confrontation reveals the boss once considered Sakoda a potential successor for Ginsekai.

In non-canonical scenarios such as the April Fools' story "The Newcomer Host of April 1st," Sakyo mentors him in a host club setting where he observes other hosts, displaying his characteristic enthusiasm and naivety. Additional traits include proficiency in pachinko, childhood training in calligraphy resulting in handwriting praised by Tsuzuru Minagi, and a playful dynamic with the theater's cockatoo, Kamekichi, often reacting to the bird's antics.