Kugayama Wakana

Homeroom teacher for Kazuki's class, also teaches Language Arts even though she is one of the top software engineers in the country. She drives a red GT2 sports car manually (despite that pretty much everyone else just puts the cars on autopilot by then). Normally she's quite gentle and graceful but her character takes a 180 when she grips the wheel of her car.
Older sister of Mika, for her sake Wakana tries to replace their mother who died in the past.