Ever since his joining the force, Wilder (like so many of his other colleagues) has harbored romantic feelings for Miwako Sato. While Sato appeared to have taken a liking to him as well, Wilder  was easily discouraged by the way she dealt with other male colleagues, including their superior Inspector Megure (though in that case it was more a daughterly affection to a father figure, since Sato's father had died when she was very young).