I unlocked Rachael last night. Unlike the 3DS version, each character's costumes has a different set of abilities. All of Jill's variations are lame because each gets varying levels of handgun mastery. If you're unfamiliar with the game, handgun mastery is useless since no one uses handguns in Raid Mode except in the beginning as the default to earn better weapons.
Despite Rachael's questionable character design (her exposed chest is a bit excessive, but far worse is covering eyes with hair), she's the best character in Raid Mode so far. Playing as Rachael is like playing the game in Beast Mode. She has shotgun and magnum buffs and she regenerates health automatically). I played the 3DS version exclusively as Jill, but for the sake of kicking ass and taking names, I'm probably sticking with Rachael at least until I unlock HUNK. What kind of spec ops agent covers their eyes on missions? When you're this much of a badass, you don't need to see. Congratulations, Capcom. You managed to turn a joke of a character into pure, unbridled awesome.