The Storm King

Why these tropes fit

A summer princess offered as a political bride to end a war arrives at her enemy Storm King's fortress disguised as a servant rather than as his betrothed, and he elects to play along with the deception. Locked together through the winter months in an uneasy charade, the reluctant arranged-marriage partners trade barbs as he tries to unmask her and she fights to keep her cover intact, letting political enmity thaw into unexpected romance with strong Hades and Persephone undertones.

Evidence from the source

• Arranged Marriage: “Valla Sunstar was offered up in marriage to the Storm King to end the war between their nations.” source
• Enemies to Lovers: “enemies to lovers” source
• Hidden Identity: “she pretends to be the late princess's servant instead of his future wife.” source
• Marriage of Convenience: “Rodrick Fjallgard doesn't want to wed the daughter of his oldest enemy, but he'll do it to keep his people from starving.” source
• Forced Proximity: “Valla needs to survive until winter ends with her disguise intact” source
• Greek Mythology: “Hades and Persephone vibes” source
• Slow Burn: “Valla needs to survive until winter ends with her disguise intact. Rodrick is determined to make her confess.” source

Metadata source: Google Books. Quotes are used only to verify the tags.