There are only a few High Councillors, they are the most respected among the Silver flame hierarchy, managing both the Inquisitorial Guard of Purity and the Church of the Silver Flame.
Each high councilor is responsible for a field.
Such as the Adeptus Literaris, being led by High Councillor Crella, the Ministry of order, being led by High Councillor John Noren, and the Lux Primaris, led by High Councillor Lidya Moor
They answer only to High Inquisitor Seraphine, having absolute power over all under them.