"Cordelia", the heart (latin) or heart of a lion (French), albeit daughter of the sea (Welsh) is one of the sources for that name.
Phonetically it also may fit.
Guess it's too late to change things... she's Big Sis anyway ; )
She might be adopted, reason for them being in secrecy and servitude to the fairies for a person without a family would be in convenience.
Alsha has grew too, there's no reason to escape the plan, looks like it's inevitable and him dieing would naturally make other person also die.