For my Companion, I was thinking of really stacking the "Faerie Upbringing" flaw and concept. I also hope to combine it with some topical supernatural abilities that lead to good story play. Here's the current list I had in mind. Let me know if you recognize the legends I am borrowing from .
Strong Faerie Blood (Sidhe), Wealthy (she knows secret stashes of silver ore in the Eifel hills), Warrior, Skinchanger (tied to a piece of jewelry as well as her malediction), Latent Magical Ability (always nice to have room for development), Second Sight (free from Strong Faerie Blood), Personal Vis Source (I know it's hermetic, but I was considering making it her hair that contains it - it seemed so appropriate, and it's a good bargaining chip).
Faerie Upbringing, Mentor (a faerie prince), Curse of Venus, Greater Malediction (she loses all supernatural powers when someone calls her name three times, and must flee from all non-faerie auras), Compassionate, Higher Purpose (chilvalric ideals, rather misunderstood).
As far as abilities goes, I wanted a nice mix of animal-related skills, survival skills, and some martial skills. Just a smattering of social abilities, and those are tied to her upbringing at a faerie court - she's thoroughly lost among humans in many ways. Not sure yet whether I want to take any ranks in boating .
First background sketch:
She was born of a virtuous knight and a mysterious lady he met while out hunting in the woods. They fell for eachother with inordinate haste and consumed their passion on the spot. A year and a day later, a small flock of swans landed in the manor house's pond. The knight's major domus ordered them investigated, since swans were hardly common and there seemed to be something odd afoot. All the swans had strange metal collars - perhaps gold! Greed struck and he ordered the collars removed from the necks of the swans. Six of the swans proceeded to transform into boys, remarkably looking like the old knight (funny how time flows in faerie realms), but the blacksmith that handled the torc on the seventh, female swan was clumsy and mangled the jewelry - the swan flew off when church bells began to ring for matins.
Now, many years later, this swan wanders the earth. Her brothers are long dead, and she'd like a home. Perhaps one with a nice little pond and no church bells, please.