The only job a kidnapper who (presumably) wants to extort/blackmail someone is the get the *one* person who actually matters to the blackmail-ee. Ya had one job, Mr. Kidnapper.
Kidnapped the wrong person? I bet after the girl gets rescued (or released), they still let the idiot who wants to kidnap go, so that (s)he/they can try it again (and again, and again, and again, and, well, you get the point)...
Either they kidnapped the wrong person (how TRAINED HITMEN miss a target with BLUE HAIR that FLOATS) is beyond me, or their target was never the Anti-Gravity Girl in the first place, which actually would be interesting