The Seven Sacred Virtues

This was an idea Ikran had since Season 2 of Sleepy Hollow. And, oh boy, it had been on a constant shift. Basically, the seven virtues were the polar opposites of the Seven Deadly Sins, consisting of the 3 Theological Virtues (Faith, Hope, Charity), and the 4 Cardinal Virtues (Prudence, Justice, Fortitude, Temperance). Seven individuals were chosen to save the world during the apocalypse and aid the Witnesses; they were their Guardians to prevent them from persecution. It's possible they were passed down by other allies/ancestors. Here's the layout from the top clockwise:

Season 2

Faith - Katrina

Hope - Jenny

Charity - Hawley (regretfully...)

Prudence - Chief Turgado

Justice - Abbie

Fortitude - Gavin

Temperance - Ichabod

Season 3 was tough, as the Onondagas have relocated back to their homeland, and the characters and villains were awful; this was the dark age of the series.

Season 4 and the Missing Episodes

Faith - Jenny

Hope - Jake (I was on the fence with this)

Charity - Alex (I was on the fence with this)

Prudence - Ichabod

Justice - Diana

Fortitude - Gavin

Temperance - Lara (Molly's future vessel)

More is explained in Chapter III - The Seven Sacred Virtues.