"Known to her faithful as the Dawnflower, the Healing Flame, and the Everlight, Sarenrae (pronounced SAER-en-ray[1]) teaches temperance and patience in all things. Compassion and peace are her greatest virtues, and if enemies of the faith can be redeemed, they should be. Yet there are those who have no interest in redemption, who glory in slaughter and death. From the remorseless evil of the undead and fiends to the cruelties born in the hearts of mortals, Sarenrae's doctrines preach swift justice delivered by the scimitar's edge. To this end, she expects her faithful to be skilled at swordplay, both as a form of martial art promoting centering of mind and body, and so that when they do enter battle, their foes do not suffer any longer than necessary"

This was Bridgette's Goddess in the origional campaign she was created for. Do we have a god/ess that matches this? it seems like a hybrid of several of our gods. If there isnt one that fits well, is it ok to make a lesser or demi god that does fit this persona?

Also, would our god of music be our chaotic neutral god of creativity and crafting?

Players are allowed to create demigods if they want.  Creation of demigods is basically unrestricted.  In my opinion, Sarenrae would be an appropriate demigod.  You are correct that she is a hybrid of existing gods.

The music god could also be the CN god of luck, or the realm of music could be shared between them.

The only council i would add is to limit domains to no more than 2, and avoid silly power weapons as the favored weapon...

considering your interpertation of 'silly power weapons"... lol