Okay, it isn't perfect (or particularly long), but there's a small hint at the kinds of things Ren gets mixed up in. 

These particular gentlemen are petty criminals from Galimidine who hired her to talk to their dead leader... It turned out that the leader had only [i]faked[/i] his death, and ran off with everyone's shares of their last big heist. The corpse the men had found was in fact an innocent bystander who the wayward leader burned to death, in order to disguise the corpse as himself (and this bystander was the spirit she spoke to). Well, when she dutifully relayed this information to the criminals, they got righteously pissed off, and sicced their attack dogs on her [i]and the griffin she was with[/i] (hence their being idiots). Corin bit one of the dogs in half, just making them more mad, and the girl and the griffin got away pretty much scot-free.

Now they've figured out that she lives at the Academy, and are storming down to "get her", as she's the best connection they can find to their much more clever old boss. 

Option A: Aoife beats them up for Ren, using her super-badass magical martial arts skills, and takes them in alive so that they are brought to justice in the city.
Option B: Corin eats them. 

Option B is much messier, and more difficult to explain to the Galimidine guards...