On the one hand, Allia is, as was mentioned, one of the few girls in the village around Nephie's age and height, so there's a bit of a connection there, maybe some fondness. On the other hand, Nephie probably thinks of Allia , a bit disparagingly, as a bookworm who dreams of adventure, while Nephie is out there, routing bandits. Nephie probably only even knows Allia thanks to her friendship with Mella and currently doesn't think that she'd be though enough for what they're planning. Or, at least, that's what I have so far.