In fact, the episode where Yoshimitsu had Komahime entertain Hidetsugu, who stopped in Yamagata-jo Castle on the way back from the subjugation of Masazane KUNOHE, was probably a fictitious story made up in later ages.
なお、九戸政実討伐の帰途、山形城に立ち寄った秀次を、義光が駒姫に接待させたという挿話は後世の創作とみたほうが妥当である。