I wanted to do a really freaky or outlandish creature. I realise that it's completely impractical as the tail might be uncomfortable in flight. The thing is erm... it's young. Young these-things have big tales when they're young as that is the time when they do their killing and eating to grow strong and healthy. It can't fly very high but it can fly really fast. When it becomes an adult it's tale falls off so it's relatively harmless and really bad at hunting. The main purpose of adults is to mate so as soon as they loose their tale they get hormone-crazed. This is a young one. I'm not sure about the young woman. She's mysteriously significant in some way. She could be magic-user of some kind bending the this-thing to her will or perhaps the this-think thinks she's its sister. That might be really scary for her later on as it is not uncommon for these-things to mate with their siblings.
I'm gonna put one of these-things in one of my stories some day but they don't have a name. Any suggestions are welcome.