Isogai

Isogai is the Furukawas' elderly neighbour. Even though she does not debut until, her name is mentioned as early as , when Fuko coincidentally took her last name as her false last name. She later makes a cameo in, when she attends the school festival and watches Nagisa's play with Sanae.

In the ~After Story~ episode, a disguised Sanae takes the name Sanako Isogai as her false name while she pretends to be Youhei's girlfriend. In, the real Isogai tells Tomoya that the neighbourhoods finds Akio and Sanae running out of the store entertaining.