Because Hyde is becoming more powerful and starts taking over his body, Hyde represents his evil side and Jekyll doesn't want to be consumed by him.
The subgenre of the given poem is BALLAD.
Danny Reever is a poem by Rudyard Kipling. In 1890, it was one of the first of the Barrack-Room ballads. It is about a British soldier who is being executed in India. The execution was in full view of his regiment. The poem is composed of the remarks made by the spectators as they watch the soldier being hanged.