Final answer:
Ophelia is describing Hamlet, whose disheveled appearance signifies his emotional and mental turmoil in the play.
Step-by-step explanation:
Ophelia is describing Hamlet in the given lines from Hamlet by William Shakespeare. Ophelia illustrates a disheveled and disturbed Hamlet who has come to her quarters with his shirt opened ("doublet unbraced"), no hat ("no hat upon his head"), stockings dirty and down ("his stockings fouled/Ungartered, and down-gyved to his ankle").
This description of Hamlet's appearance suggests his mental and emotional disarray, conveying a sense of intense internal turmoil that outwardly manifests itself through his unkempt and disorderly state.
Ophelia is describing Hamlet in the quoted passage. In this scene, Ophelia is speaking to her father, Polonius, about Hamlet's appearance and behavior.
She mentions that Hamlet is wearing his doublet unbraced, which means the front of his jacket is unfastened. She also says that his stockings are fouled and unfastened, and his ankles are down-gyved, meaning his socks have fallen down to his ankles.