| Louis Guiabern | |
|---|---|
 Louis Guiabern in Metaphor: ReFantazio | |
| First appearance | Metaphor: ReFantazio (2024) |
| Designed by | Shigenori Soejima |
| Voiced by | EN: Joseph Tweedale JA: Yuichi Nakamura |
Louis Guiabern is a fictional character and the main antagonist in the 2024 video game Metaphor: ReFantazio. He is responsible for the assassination of the king of the game's world, and the protagonist and his allies seek to kill Louis in order to break the curse placed on the prince. He is protected by the king's magic, which emerged to prevent someone from taking the throne by force, and instead requiring them to earn the majority support of the kingdom's people. He is noted for his proficiency in hunting large, monstrous beings called "humans", that roam the lands. He was designed by Shigenori Soejima, and was designed to be as appealing as the protagonist and to be seen as a "second protagonist."
Louis has received generally positive reception, with multiple critics praising him as a breakout star of Metaphor and among the best villains in Atlus games and Japanese role-playing games in general. He was noted for being a sympathetic villain in spite of his brutal and evil actions. He has also been compared to Lucifer, as well as villains in anime and manga, such as Griffith from Berserk.