No. You play as Rose Belmont in Castlevania: Belmont's Curse. A YouTube gameplay overview explicitly identifies Rose as the character you control and says you do not take command of Trevor. Trevor accompanies his daughter in the story, but that does not make him a selectable protagonist.
Who do you play as instead?
Konami's official character page introduces Rose as the new protagonist. She is Trevor Belmont's daughter, a vampire hunter with Dracula's curse affecting her right arm. Her equipment includes a whip and several other weapon types.
If Trevor's traditional vampire-hunting style is what interests you, Rose still offers whip-based action. Her abilities also give you other ways to approach exploration and combat:
- Whip traversal: Grapple to designated points, swing across gaps, and pull yourself toward enemies.
- Weapon choices: Experiment with weapons such as lances, greatswords, and close-range gauntlets.
- Arcana abilities: Use magical powers and improve them through associated Works of Mercy challenges.
These mechanics are described in the YouTube gameplay guide. They develop Rose's abilities throughout the adventure; they are not a character-switching system.
What is Trevor's role?
According to Konami, Trevor defeated Dracula twenty-three years before the events of Belmont's Curse using the Vampire Killer whip. He and Rose travel along the Seine after receiving a request for help from Paris.
That gives Trevor a direct connection to the adventure, even though Rose is its protagonist. His appearance on the official Main Characters page identifies his importance to the story, not his availability as a playable character. The same page includes other story figures and does not function as a character-selection roster.
Konami lists JB Blanc as Trevor's voice actor and Abby Trott as Rose's. Trevor's casting and dialogue establish his presence in the game, but neither indicates a playable mode.
Can you unlock Trevor or play him through a mod?
An official Trevor mode or unlock requirement has not been officially confirmed. There is no verified Trevor unlock procedure to follow here, so do not treat completing an ending or upgrading Rose's abilities as a documented way to switch characters.
GameSpot's endings guide describes a Rose skin reward associated with the False Ending. A cosmetic reward for Rose does not establish a playable Trevor unlock.
A working Trevor mod also cannot be verified from the linked Nexus Mods listing: its accessible page does not identify the mod's features or explain what it changes. Without those details, it cannot establish whether a mod offers a visual replacement, different abilities, or a playable Trevor character.
For the main adventure, expect to explore, fight, and build your character around Rose Belmont.
