Final answer:
Antonio from Shakespeare's play 'Twelfth Night' speaks the lines about rescuing someone from the sea and giving them his love; the passage illustrates themes of loyalty, love, and betrayal.
Step-by-step explanation:
The character saying "Though, I confess, on base and ground enough, Orsino's enemy. A witchcraft drew me hither. That most ungrateful boy there by your side from the rude sea's enraged and foamy mouth did I redeem. A wreck past hope he was. His life I gave him and did thereto add my love, without retention or restraint, all his in dedication" is Antonio from William Shakespeare's play, Twelfth Night. Antonio expresses his devotion and the deep sense of betrayal he feels towards Sebastian, whom he rescued at sea and loved unreservedly. This passage highlights themes of loyalty, love, and betrayal which are central to the play. The excerpts provided encompass various works by Shakespeare, and they exemplify his renowned use of dramatic monologues to reveal character emotions and dilemmas.