Montepelier serves as a light cruiser for the Eagle Union faction, characterized by a reserved and unsmiling nature that complicates connections beyond her immediate sisterhood. This relational challenge starkly contrasts her profound loyalty and deference toward her elder sister Cleveland, whose judgment and actions she perceives as consistently correct. Montepelier relies on Cleveland's guidance while harboring an undercurrent of envy, specifically targeting Cleveland's perceived emotional resilience and capacity for smiling.

She operates under several aliases: "Flower of the Snowy Night," "Legend of the Solomons," "Cleve-FC.1," and the informal "Monty." Her real-world counterpart is the historical USS Montpelier.