Victor is the creator of the creature and is also one of the main characters of the book. He is very obsessed with the idea of bringing the dead back to life and makes it his goal to achieve this feat.
The Creature is born into this world by Victor's experiments. He is intelligent but also ignorant. He knows nothing but learns quickly.
Elizabeth is Victor's future wife and his love. The Creature kills Elizabeth for revenge because Victor would not create a mate for the Creature.
The application of knowledge today represented in the book.
The Creature uses knowledge in a different way though. He uses it as a way to figure out who he is and where he fits in this world. Even though the answer to the creature's question is bleak he still uses his knowledge to concur his fear and try to find a solution. He approaches Victor and asks for him to make someone he can fit in with and share his life with. He learns so much from his experiences and encounters with others that he accepts his fate. When Victor denies him of this simple fate he takes his revenge.