In the crossover drama CD bundled with the Servant × Service limited edition Blu-ray/DVDs, she and Jun go together to enter their names into the family register, and instead of babbling about Kyoko to others, she now boasts about her husband, Jun.
Jun is a helpful but intimidating 20-year-old chef who works in the kitchen.
She is 28 years old, but she becomes despondent whenever she is called old or any variation thereof.
Kyōko used to be a juvenile delinquent and she met Yachiyo when she saved her from bullies when she was a little girl and demanded food as payment.
Yachiyo is the 20-year-old chief of staff of Wagnaria.
She usually carries around a katana which, according to her, was made by her parents who used to be blacksmiths.
She admires Kotori, Sōta's cross-dressing persona, and the Takanashi sisters because of their tall and mature look.