Reimu smiled a little at Chara's rant.  "Well, it seems we have a common enemy.  She didn't do anything to me, at least not yet, but she stole something precious from some... friends of mine," she said, not wanting to give away what was stolen or from whom.  "They want it back, and sent me to collect it... and her.  I came here for information, to find out where she is.  As for what's in it for you... how does revenge sound?"  Reimu crossed her arms and leaned against the doorframe, smiling.  "While I would love to have her captive, to bring her to the people she stole from, it's not as important.  You help me find her, I help you subdue her, and then you can do whatever you want to her."