Yamashita

Yamashita (山下 Yamashita) is a senior developer at Kobayashi's workplace, Jigokumeguri System Engineering Inc.

He appears once in the manga, in a flashback, when Kobayashi explains to Takiya that she has to deliver an urgent fix to one of Yamashita's projects.

In the anime, Yamashita also appears in several later episodes. In episode 11, he informs his co-workers that he is going back to Hokkaido to see his family, and promises to return with Nama chocolates. In episode 13, Yamashita consults Kobayashi over several code revisions. In the OVA, Yamashita distributes the promised Nama chocolates to everyone at work during Valentine's Day.