For an infantry unit Nephenee is pretty good. She uses a good weapon type, packs a good skill that will go great with Vantage, and has a good stat spread, though she comes underleveled and will want some BEXP and a forge to get going.
Problem is she comes during a period where quite a few units want those resources and have a better claim to it than she does. She's not a great supporter and her only reasonable partner is Calill. She perfectly useable if you put the effort into her but at the end of the day she's just a country girl in game where knights rule the day.
+1 since she's still my favorite character so 6/10