Based on the given information, the guard is most likely to take Mordechai away from the platform quietly, potentially to be executed elsewhere. The fact that Mordechai is experiencing a panic attack and is anxious about the destination of the train suggests that he is likely a Jewish prisoner being transported to a concentration camp or extermination camp during the Holocaust. The guards in charge of transporting prisoners during the Holocaust were often cruel and unsympathetic to the prisoners' suffering, and it is unlikely that they would have taken Mordechai to see a doctor or shown him any compassion. Instead, they would have been more likely to punish or kill him for showing signs of weakness or resistance.
~~~Harsha~~~