Arrogant Malvolio
Malvolio's coming down this walk; he has been yonder i' the sun practising behaviour to his own shadow this half hour: observe him, for the love of mockery; for I know this letter will make a contemplative idiot of him.
- Act II, scene v, line 15
In love with himself
This is a play about people falling in love with one another. The Duke is in love with Olivia. Olivia herself is in love with Viola who is disguised as the boy Cesario. Sebastian marries Olivia in the end. Shakespeare is showing us all the madness and passion that comes with falling in love.
Malvolio gives depth and richness to the romantic theme. His character is in love in quite a different way: he is self-loving and vain. He cares for no one as much as he cares for himself.