Who is Jessica, and in her soliloquy at the end of scene iii, what does she tell of her feelings and what she plans to do?

Jessica, the daughter of Shylock, meets with Lancelot and tells him that she will miss him after he leaves to go work for Bassanio. She hands him a letter to take to Lorenzo, who is supposed to be a guest of Bassanio's that night. After Lancelot leaves, Jessica informs the audience that she is in love with Lorenzo, a Christian. She intends to meet him soon and run away from her father's house in order to marry Lorenzo.