Red

"Well, I do my job very well." I cockily smirked, swinging the weapon around my finger.

She's a known for her color
The color of red.
It could be because of her ginger hair, or the crimson red weapons she uses for her victims.
Luring in her next prey with her looks and body language.
She's a seductress with one goal:
That's killing her victims, mercilessly.
She's a hitwoman,
a red devil in disguise.

He's known for the power he hold.
Ruthless, stoic.
The way he can kill a person without laying a finger on them.
Heartless, that what he is.
Slithering venom in the dark. Poison.
He's a...
A monster.