While the most glaring use of Chara’s necromancy Red Bloodline magic is the incomplete, messy revival of the dead who’s SOULs are long since shattered & absent, that isn’t really the full scope of her abilities.
Determination is the driving force behind life, and as such, someone who can control it is capable of gifting it upon others; alive or dead. Upon the living, it’s needless to say that a substantial boost to one’s DT (within a reasonable range) can be a wondrous boon to almost anyone.
While she’s not quite powerful enough to boost someone to the point of being able to hold onto a SAVE file, she can bolster a SOUL’s will to live, healing it and letting it fight harder to hang on to life- let them refuse to die.
This effect is much more apparent among monsters than it is humans, due to the way their body’s start to dramatically fall apart near death (thus pulling themselves back together when Chara wills it), and if a monster is already particularly determined it can even trigger a magical transformation.
She can’t really heal humans, due to their physical bodies being separate from their SOULs, but she can rescue a human’s SOUL from shattering if she gets to it fast enough. Animal souls too, actually; that’s how she discovered the ability.
At the same time, she can also take it away; only in small increments at the moment, but the ability is still there, and can negatively effect those that rely on the powers DT provides. She could make a monster fall out of a powerful form just as easily as she could trigger one. Upon humans, once again, the effects are less physical; and really, can only be felt by the current SAVE holder.
Who, if they’ve become her target, will find their LOAD times increasing to infuriating levels over the course of whatever run they’re attempting.
However, she doesn’t really use this ability much for offense... the most she’s used it for recently is upon the amalgamates, having taken to working their DT up or down as is required to find a preferable balance that keeps them from dusting while hopefully making them more comfortable,
Her first “success story” of this side-therapy of her’s is Corinthian, the amalgamate formerly known as Reaper Bird, who’s coalesced into much more... ‘singular’ being. Capable of speech and rational thought, and no longer at risk of melting away into nothing. Still a bit wild-natured, though.
But, as said, the positive effects of this magic are all very... difficult to see among humans. While we could see her bringing a dog back from the grasp of death, all the superstitious villagers would see is a witch playing with a corpse.
