They watched.

With each passing day they saw a little colour leave his eyes until the was nothing left.
With each passing day they saw how he seemed to lose more and more of himself
With each passing day they began to realise there was nothing they could do
Caspian had lost his love
Caspian had lost himself
so with each passing day they watched as he faded into nothing knowing that there wasn't a thing they could do.

Ok this was just some random thing I thought of while listening to nobody see by powder finger.