KARSSA

Age: 24
Occupation: Mercenary/Assassin
Height: 5'3
Is: quiet, serious, stern
Isn't: playful, goofy, loud  
Likes: Her work
Dislikes: people who goof off, people interrupting her work, submission

Karssa is basically Cellene's polar opposite. While her younger sister is goofy and annoying, she herself is quiet and calculating, often acting like a machine while performing her jobs. It is due to this that she is so successful, and will perform most any task as long as it pays.   

Backstory

Not much is known at this point, other than that Karssa and Cellene grew up together, until the elder mage left for higher training. It's believed that somewhere along the way there, something happened which turned the girl so cold. She doesn't necessarily hate her sister, yet she dislikes Cellene's often immature and annoying attitude.    

Bondage doesn't have much of an enjoyment factor, rather she uses it to secure others when needed in one of her jobs. Apparently she became very skilled at tying knots from getting her sister out of the way when the two were younger.
She loves to be in control, so she absolutely hates being tied up herself.

Abilities

Karssa grew up with ice abilities, which are a lot more developed than her sister. She can generate ice from her fingertips with hardly any movement, mostly using this to secure her targets in a kidnapping assignment. The ice can be applied heavily, resulting in a boxtie, wrist tie, heavy gag, blindfold, etc. Each block is also very durable, usually either removed by breaking and shattering it with a heavy hit, or by Karssa herself. To do so, she can call upon her manipulation and absorption abilities, which can change the form of ice or turn/melt it to water and absorb the energy back into her body for use later. 

Being a mercenary, she is extremely proficient in close combat, either by her fists and strikes, or by her two blades she carries sheathed upon her back. Using her ice magic, she can also create weapons using her element in a small flick of the wrist, if her two swords become unusable or are taken away.