The Giants of Purgatory are not just guardians. They are Purgatory itself who are given form and will.
Forged from the essence of the realm, they stand at the edge of the Gates — not to pass judgment, but to enact the will of the realm when a soul marked for Eternal Damnation dares to cross into the Gates. If they dare, the giants must engage, not out of hatred or cruelty, but because escaping such a soul would fracture the fabric of Purgatory itself.
Their purpose is singular, that is to neutralize the karma of damned soul if provoked. This is no simple removal. The process requires the Giant to draw the condemned's karmic weight into themselves, burning it within their soul. In doing so, they erase the threat at the cost of their existence. For when a Giant dies, a part of Purgatory dies with them. For this reason they are infamously called as the Soul Eater amongst the eternally damned.
When such a death occurs, the realm reels. The skies dim, the rivers of light falter, and the Gates strain to remain whole. To recover from this wound can take millions of years, and until then, Purgatory remains weakened — vulnerable to forces beyond even its dominion.
The cleansing ritual at the Gates is meant only for sins that can be redeemed. It does not forgive; it only purifies what can be resolved — the lesser sins, the stains of mortal life that have not yet rooted themselves into the eternal soul. A fraction of time passes in Purgatory, but an eternity passes for the soul ongoing the ritual. But for those deemed eternally damned, whose karma has become an unyielding chain, the ritual fails. The Gates cannot dissolve their weight.
If such a soul somehow crosses the threshold, the gates shatter, and the soul is reborn without cleansing. All their karma clings to their new life, festering like an unhealed wound. The world they enter does not receive a child; it gets the continuation of a damned soul's story, still carrying every sin, every weight, every shadow of their former existence.