She comes up with a plan to save Antonio all on her own and tricks the entire household into thinking that she and Nerissa will be away at a monastery. Her actions reveal just how clever she is, as she alone was able to find the loophole that would make Shylock’s bond impossible to collect. While the other characters were weeping and lamenting the hopelessness of Antonio’s fate, Portia remains cools and collected. She points out that spilling a single drop of blood would immediately break the law and result in Shylock’s execution. She was able to think her way out of a difficult situation and successfully execute her plan. She does not just leave Antonio’s fate up to chance; she takes the steps necessary to save him herself.
As can be seen, Viola and Portia have incredibly different attitudes. Viola is often content to wait and see how things will turn out or to go along with the will of others. Portia, on the other hand, is much more proactive and finds ways to improve her situation all by herself. She manipulates both the casket game and her marriage with Bassanio, as well as find a method of saving Antonio. Her assertiveness makes her the stronger of the two