What are the similarities found between the characters Portia and Antonia in Shakespeare’s play ‘The Merchant of Venice’?
Both Portia and Antonio display their loyalty towards Bassanio, as his wife and dearest friend respectively. Both are selfless and use the money for the betterment of others rather than their selfish needs. Both display their love for Bassanio.
I have answered a similar question at length here: Compare and contrast Antonio’s melancholy to that of Portia. This should help you.