Fuu was the pothole in the middle of the road, the one that's hard to see clearly, even at noon. She's on the smallish side, not nearly big enough to attract much attention, and she's closemouthed about everything to everyone, total strangers and best friends alike.
Fuu enjoyed tripping people up (but only people she didn't like) and she especially loved watching them stare at her in fear and anger and respect as she flipped them over.
Fuu was deep (deeper than you'd think, looking at her) and smooth and just two steps away from cruel. And she liked it.