Question

the hero whose left leg he lost in the war is well looked af

Answer 1

whose 定语从句中做定语,可以修饰定语从句中的宾语也可以修饰从句中的主语,就像你的例句一样.懂了吗?又比如：

The house whose windows are open is mine.修饰主语.

the boss whose factory my father works in is kind.做介词in 的宾语.