Official summary
Faust is one of Limbus Company’s twelve Sinners. ProjectMoon’s manual characterizes her as highly knowledgeable, arrogant in manner and chronically languid.
Connection to Mephistopheles
The official profile credits Faust with developing the engine of Mephistopheles, the bus operated by Limbus Company. That engineering role is a direct official claim, not a community inference.
How the profile frames her
Faust believes no one in the City can rival her knowledge and wisdom, and the manual concedes that this claim is not necessarily wrong. It also portrays her as difficult to use effectively despite that intelligence.
This profile covers the continuing character only. Individual Faust Identities represent alternate possibilities and need their own current kit evidence before receiving build advice.