Answer:
Mr. Kirwin; because he had charged Victor before.
Step-by-step explanation:
Frankenstein or the Modern Prometheus is a novel written by Mary Shelley and it discusses many issues about science and ethics. It was published in the 19th century, when Shelley was very young. In this case, Mr. Kirwin is the one who saves Victor. Irony is a rhetorical device that expreses the contrast between what happens and what is expected. In this case, Mr. Kirwin had previously charged Victor with murder, but then, in chapter 21, he decided to help Victor.