Essentially yeah.I guess you can order mannequins online with no trouble and on relativly short notice.
It won't scare the vampires, but if her car ever gets stopped by the police and she has two full-sized mannequins in the trunk that may or may not be moving when nobody looks, then there are gonna be some stories to tell.
If she woke up on 1st October with the power Command The Dead, after having had an akuma show up at the ghost ball the day before, rush ordering a bunch of wooden sculptures off the Internet, or just buying them from a local sculptor would could well have them delivered in 24 hours.
Money is a superpower.
Especially if you are Resources 4.