Which side of the king does the queen sit?

In a standard Chess setup, the queen is placed on her own color, meaning the white queen starts on the light square d1 and the black queen on the dark square d8. Thus, the queen sits on the side of the king, with the white king on e1 and the white queen on d1, and similarly, the black king on e8 and the black queen on d8. This arrangement ensures that both queens are positioned directly adjacent to their respective kings.