Since you didnt include the expert. I will give you the defintion of situational irony and some examples.
Defintion = Irony involving a situation in which actions have an effect that is opposite from what was intended, so that the outcome is contrary to what was expected.
Examples = A fire station burns down. This is unexpected because one would assume the fire chief would keep his own building safe. A marriage counselor files for divorce.
Frankenstein's monster refers to Lucifer here, one of God's most beloved angels, who committed a crime and was thus banished from haven into hell - he was the first fallen angel, believed to be the devil, Satan himself.