Orsino: Lovesick.
Duke Orsino, count of Illyria, despite being the object of Viola's affection, desires Countess Olivia.
Olivia: Stubborn.
Feste, the fool, would call her a fool for spending all her time mourning rather than living her life.
Viola: Resourceful.
Viola is not only attractive but also very clever, charming, and intelligent as she manages to disguise herself as Cesario sto be able to find work in Illyria.
Malvolio: Self-absorbed.
Malvolio attempts to court Countess Olivia even though she doesn't acknowledge it because she is mourning her dead brother.