^ Basically it's similar with like Xion when she began developing her own memories from being independent from Sora though she had some of his memories? Or am I off on something? And yes, my sig is giving off some cutie-vibes. :3
It is similar in the vein that "developing own memories" is what counts as also "nurturing an own heart" since memories are an integral part of forming one's own heart. It is the
basis that differs. In Xion's case, the
basis were an "empty" Replica-heart combined with some memories of Sora that formed the basis while in Vanitas' case the
basis was the dark part of Ventus' heart.
The basis doesn't stay just that though in all cases but it evolves, like cell division results in eventually two fully functionable cells or, like Xemnas describes it, like a flower "bud" that can develop into a heart under the right circumstances. That's probably also why Master Xehanort in the original japanese version speaks of "seeds" he scattered.
This holds true for
any possible spawned new existence that fulfills the criteria to build a heart, so Roxas, Naminé, Xion and Vanitas are
all included.
This is also why I do not acknowledge the claim made sometimes that Ventus and Vanitas are "incomplete" or can't exist without each other. They can, as they each have their own hearts.
---
Who's that mini-cat guy anyways, lol?
