Viola's twin brother, whom she believes is lost at sea, and who likewise thinks she's dead. Sebastian is noble and capable of strong, deeply felt emotion, just like his sister. The constant powerful love he shows while grieving and when reunited with Viola contrasts Orsino's and Olivia's relatively frivolous emotions. He is also the only major character in the play who never engages in deception. He can be pragmatic, though: when the beautiful, wealthy Olivia proposes to him, he accepts despite the fact that he has never met her before.