Seven Deadly Sins for ROM 4 ((changed a little from comic as there are plot implications))
Ivy of the Pride/ Vanity
Element: Earth
Appearance: As in the comic

In this form she can use her rope like bard as a whip or lasso
Powers: She has a demonic transformation as all the deadly sins do.
The appearance of the demonic form is simpler to this but she isn't naked, her clock will remain over the centre of her body while the leaves and branches sprout out from her arms and legs.

In this form she has the following attacks.
Poison Ivy: The branches have spikes that secrete venom. She swings these branches at her opponent.
Root Crusher: The roots are embedded into the ground and then vibrate, causing an earthquake
Storm of Leaves: Leaves become razor sharp and are cast at opponent in a gale
Forest Bear Trap: Nemours ways of using the branches as traps, like cages or grabbing bear traps. They stop opponents from moving.
Haku of the Rath/ Rage
Element: Darkness
Appearance: As in comic

In this form he is very skilled with his bladed staff
Powers: demonic form as in comic

In this form he has the following attacks
Dark Heart: Temporally turns opponent to stone
Sicker Claw: Hardness Claws and casts them at the foe
Shadow of Souls: Can make a physical illusion of a foes shadow of soul to attack
(see why there so deadly!))
Soul Reverb: Flashy name for a bite attack.
I'll post the other guys later. These will start us off.