do aoife and five have any similarities? (besides looks) is there any kind of behavior/ cute little details that they share?
There are a few, not all of which I can call to mind right now. (Also, being asked about their OC is every fanfic loser's dream so thank you!)
She inherited his penchant for peanut butter. Less of a fan of the fluffernutter sandwich but if you put a plate of peanutbutter cookies in front of thepair of them they will absolutely demolish it.
Similar posture. Hands in pockets, hunched shoulders or leaning against walls/furniture, particularly when feeling annoyed or confident.
Five has a few rhetorical devices in speech (e.g. counting things on his fingers, asking questions he already knows the answer to) I think she's probably picked up on a couple of these.
I imagine she also went through a phase of calling everyone idiots and morons until it was corrected.
Both weirdly anal about their shoes. Five likes to place them one inch apart, toes touching vertical surface (ususally a wall) with the laces tucked in. Aoife is the same but likes to loosely tie her laces instead.
Tenacity. Five's thing is theoretical physics, hers is music, but they will both hammer away at it as if it's the cure for cancer.
There will be others, but I can't call them to mind right now.














