seladorie:

Chapters: 5/?
Fandom: Final Fantasy XV
Rating: Mature
Warnings: Creator Chose Not To Use Archive Warnings
Relationships: Prompto Argentum/Noctis Lucis Caelum, Gladiolus Amicitia/Prompto Argentum, Prompto Argentum/Ignis Scientia, Noctis Lucis Caelum/Ignis Scientia, Gladiolus Amicitia/Ignis Scientia, Gladiolus Amicitia/Noctis Lucis Caelum, Gladiolus Amicitia/Prompto Argentum/Noctis Lucis Caelum/Ignis Scientia
Characters: Prompto Argentum, Aranea Highwind, Noctis Lucis Caelum, Ignis Scientia, Gladiolus Amicitia, Nyx Ulric, Clarus Amicitia, Crowe Altius
Additional Tags: Alternate Universe, Alternate Universe – Soulmates, Soulmate-Identifying Marks, OT4, Assassination, Stalking, Revolutionaries, BAMF Aranea, BAMF Prompto, Writing on Skin, rape mention, Fear of Rape, NO Rape Happens, Imprisonment, Implied/Referenced Domestic Violence, Depiction of Fictional Fascist Government, Human Experimentation, Restraints, Unwilling Restraints, not as dark as the tags imply, explores politics in a world with soulmates, Politics, Worldbuilding, being soulmates does not make a relationship, they have to work for it, prompto grows up in niflheim but is not an MT, soulmate au where what you write on your skin appears on your soulmate(s)
Summary:

Prompto has three soulmates, but he’s got to help the resistance, fight an empire, and assassinate an emperor, and it’s not like his soulmates write to him anyways.

Or: the Chocobros OT4 Soulmate AU

A Royal Soulmate – Selador – Final Fantasy XV [Archive of Our Own]