Eyes of Violet

Ash just wants to keep his sister safe. Their father is a cruel man, a powerful man. Ash does his best, but one day he is forced to flee, his sister bleeding out in his arms. He is found by mutants- magical beings that, in most cases, look as human as he is. A dangerous bunch, he was always told. Vile creatures, obliteration personified, death awaits all who meet them.

So... why do they help him? What's their game? Is it, despite everything he's been told, that they're not monsters? Or is it, despite all reason, because Ash's sister is one of them?