Here is a quick list of the Romantic features in Frankenstein:
Emotion and Imagination: Valuing raw human feelings and creativity over cold, rational science.
The Sublimity of Nature: Using massive, wild landscapes (like icy mountains and storms) to mirror characters' inner turmoil and evoke awe.
Critique of Science and Reason: Warning against unchecked ambition and the dangers of pure logic without empathy.
The Isolated Individual: Featuring the classic Romantic outcast archetype, where both creator and creature suffer in profound physical and emotional loneliness.