Pre-release stills for Fate/Zero’s 18th episode show it to be a completely different affair than anything offered prior – Kiritsugu is a kid, and it looks to take place on an island setting, a flashback from his past.
Having not been shown even a sliver of Kiritsugu’s past save for a short and rare scene many episodes ago, one can hardly speculate what Kiritsugu’s past contains. And not simply is it difficult to figure what this episode of an island childhood will entitle, yet also the scope of it is a mystery – for example, will this setting prove to be where Kiritsugu comes to face a darker side of reality? Or perhaps could that be something which follows later?
More than likely, seeing as Kiritsugu is portrayed quite young here, one can presume that his childhood will be exhibited as it develops for a while, and then it will take a sudden rough turn as darkness comes to light. If everything were to simply start from a negative point in Kiritsugu’s life, there’d be nothing to contrast or compare – and logically, he’d have ultimately ended up akin to Ryuunosuke as he’d not have experienced a humane living at all.
While the island itself isn’t giving many recognizable clues – do notice the woman in the last image below however. Of course, this female is a key element, whoever and whatever she may be – and it’s worth mentioning, observe how she stares off into the distance with Kiritsugu, yet a distance extends between them. This is a peaceful scene shared amongst two, although they don’t appear intimate enough to be family – she could however be a mother figure to him, and if that’s the not the case, one can only go wild wondering what sort of strange relation is it they share.
Whatever may occur however, the aspect which is certain is that Kiritsugu will eventually meet a more brutal side of the world which will lead him to how he is now – a man willing to take on any sin for sake of stopping them all.