(Final Fantasy 15) Promise Never Spoken

What if Noctis had one more person by his side?
When six-year-old Makiana mysteriously appears in the gardens of Insomnia, King Regis takes her in with one promise: until they find her way home, she will always have one in Lucis.
Years pass, and the strange girl from another world becomes family. Raised alongside Prince Noctis, Makiana grows into a gifted White Mage-the last of an ancient order long thought to be extinct. While the Crown searches for answers about her origins, she finds something she never expected: a home... and a place beside Noctis.
As the prince sets out on the journey that will change the fate of Lucis forever, Makiana joins him, Gladiolus, Ignis, and Prompto on the open road. From broken-down Regalias and monster hunts to campfires beneath the stars, their adventure begins much like any other.
But darkness is spreading.
Daemons whisper secrets only Makiana can hear. Ancient powers stir at the sight of the last White Mage, and enemies long hidden begin searching for the girl whose magic blooms with lilies and light.
As duty pulls Noctis toward an arranged marriage with Lunafreya, his heart begins to lead him in another direction-toward the childhood friend who has stood beside him through every joy and every hardship.
Some promises are made for a kingdom.
Others are made from the heart.
And sometimes... the hardest promise to keep is the one never spoken.