Seraphina,
Seraphine overall.
Serafima doesn't appeal to me.
Serafina is ok, but I prefer the ph. I like
Sofia spelling over
Sophia and
Sophie over Sophia/Sofia.
Mum to Mousie, Foo, Bumptious and Pudding
Proper names are poetry in the raw. Like all poetry they are untranslatable. - W.H. Auden