If u mean in saving antonio then here it is -
portia played a major role in releasing antonio from the cluthes of shylock. portias wisdom as well as her skills of acting help in her performance. on trying to convince shylock to show mercy with the mercy dialogue he refuses to show any mercy and was bent upon takin revenge. after placing her conditions tat while exacting  a pound of flesh he should shed blood and 2nd that the flesh exacted should not  exceed one tenth the mass of hair shylock decides to let him go after hearing a refusal of money. soon the case turns against him and in favor of antonio, thus portia was instrumental in freeing antonio
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