Did Tonelico’s/Aesc’s hair became silvery white when she assumed the identity of Morgan because of the sheer trauma-induced stress the fairies caused her?
If so, this would add another tragic element to her story that highlights the sheer impact of her trauma just like its shows with Baobhan Sith when in her 3rd ascension seemingly having psychotic episodes in which she hallucinates people who wronged her and PTSD-induced panic attacks.