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 has also been compared to Lucifer including its incarnations in Atlus' Megami Tensei franchise, as well as villains in anime and manga, such as Griffith from Berserk.

He has an antagonistic relationship with other characters, including Strohl, whose village he ordered to be destroyed by humans, monstrous creatures that roam the world, and Hulkenberg, who aims to save the prince after failing to do so years prior.

They initially mortally wound him, but Zorba, one of Louis' allies who is able to reanimate the dead, manages to save his life, utilizing the spear to kill Forden.

Louis has multiple allies, including Zorba, Junah, Basilio, and Fidelio, the latter two having joined him because of their belief that he would improve the lives of paripus, the race they belong to.

With Will having fused with the prince, he and his allies, having regained their popularity after breaking a group of magla-infused crystals that incited insanity amongst the commoners, encounter Louis once again in the Royal Palace, where he tries to make an offer for the protagonist to join him.

[a] However, Will refuses, and Louis, having created a magla-infused star with the Royal Sceptre, awaits a final confrontation with the protagonist and his allies retreating to Grand Trad to prepare.

She also praised his English voice actor, who she felt made him charismatic, intimidating, and "awe-inspiring," as well as elevating Louis to among the best video game villains.

[7] GamesRadar+ writer Oscar Taylor-Kent praised Louis, stating that he was the first "Sephiroth-level" villain for Atlus and comparing him to Sephiroth and Griffith from Berserk for his intimidation and charisma respectively.

He also discussed how, despite being "stylish [and] glamorous," he was not an "offensive play on effeminate stereotypes," commenting on him as powerful, charismatic, and a "thinly veiled indictment against modern demagoguery.

[13] Real Sound writer Chihiro Yuki suggested that the protagonist, Louis, and Forden each represented their own path, evocative of the Shin Megami Tensei series.