Sun's Girl-

Outfit- 

Weapon- A spear that can become a giant bolt-action sniper rifle

Semblance- mind reading 

History- you're a wolf Faunus who's blake's adopted sister  

Neptune's Girl-

Outfit-

Weapon- dual guns that can become dual daggers.

Semblance- Teleportation

History- used to be one of neptunes girlfriends before he cheated on you. Now, you're back for revenge!  

Mercury's Girl-

Outfit-

Weapon- A black staff that can become dual handguns 

Semblance- Liquid form

History- you're cinders little sister, who's been helping her behind the scenes this whole time. You do most of the brainwork, while cinder shows off, but you don't mind. 

Ren's Girl-

Outfit-

If the pic doesn't answer itself, yes, you are a ninja.

Weapon- daggers that you control with your semblance  

Semblance- Telekinesis

History- you're a rouge ninja from a faraway land (pls bear with meh) and are also the daughter of the chief. You leave to find new life.