User blog comment:Real Godisme/The Ultimate Review - Week 1/@comment-7418318-20140929170341

I really can't imagine that Hakuryu could kill Arba. All the Al Tharmen members' bodies are really just projections or puppets filled with a projection of their will or somesuch.

It took a power that Sinbad had been hopeing he could hide and both sides of the Rukh to fully eradicate Ithnan in Balbadd and Arba is way more powerful than Ithnan was. So at best Hakuryu destroyed her current body, but she'll be back soon enough.

I wouldn't even be surprised if it turns out that Arba let Hakuryu destroy her body (while letting it look as if he won) for some reason or the other.