Claudius Aelianus
It is written in Plutarch's Second Oration On the Fortune or the Virtue of Alexander the Great (see "Moralia"), and in Claudius Aelianus' "Varia Historia" that Alexander left a tragedy in a theatre because he did not wish to weep at fiction when unmoved by his own cruelty. This suggests that while Alexander was a tyrant, perhaps his iron heart could be softened. The actor was threatened with punishment because Alexander was so moved while watching.