Wow, those are some pretty conflicting adjectives. Soft, calm, and fluffy could be pretty easy to find, but fluffy and elegant? Soft and grand? I'm not sure of anything that would fit that criteria. Was this from a creative brief from a client?

Find a narrow, light sans with curvy terminals.

Real quick:
http://www.myfonts.com/fonts/latinotype/tikal-sans/light/
http://www.myfonts.com/fonts/henning-skibbe/haptic-pro/light-pro/
http://www.myfonts.com/fonts/andrijtype/oksana-text-narrow/light/
http://www.myfonts.com/fonts/millertype/swagg/light/
http://www.myfonts.com/fonts/insigne/marintas/thin/
http://www.myfonts.com/fonts/northernblock/regan-alt/light/

hhp

Yes it was the part of the brief. Thanks for the suggestion hrant.
First came to my mind was Barmeno and FF Sari. Between both, which one is better? it looks the same to me.