A major theme in Frankenstein is a thirst for knowledge and the undiscovered. whoch characters actions best brings out this theme

The character that best brings out the theme of a thirst for knowledge and the undiscovered would probably have to be Dr. Frankenstein himself. This is so because it is he who creates the monster out of his thirst for discovering the undiscovered, and it is his action of creation-being the creator-that illustrates his knowledge and thirst of it.