Who is imprisoned on Shallott?

The character imprisoned on Shallott is Lady of Shalott, a figure from Alfred Lord Tennyson's poem "The Lady of Shalott." She is cursed to weave a tapestry and can only see the outside world through a mirror, never directly. Her isolation stems from her desire to experience life and love, ultimately leading to tragic consequences when she defies the curse by looking at Sir Lancelot.