So I found this massive list of character flaws and picked out the ones that applied to darling Kas.
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Abusive - Characterized by improper infliction of physical or psychological maltreatment towards another.
Addict - One who is addicted to a compulsive activity. Examples: gambling, drugs, sex.(Killing)
Alcoholic - A person who drinks alcoholic substances habitually and to excess.
Anxious - Full of mental distress or uneasiness because of fear of danger or misfortune; greatly worried; solicitous.
Arrogant - Having or displaying a sense of overbearing self-worth or self-importance. Inclined to social exclusiveness and who rebuff the advances of people considered inferior.
Audacious - Recklessly bold in defiance of convention, propriety, law, or the like; insolent; braze, disobedient.
Blunt - Characterized by directness in manner or speech; without subtlety or evasion. Frank, callous, insensitive, brusque.
Complex - An exaggerated or obsessive concern or fear. (List specific complex.) Ending up alone.
Cruel - Mean to anyone or anything, without care or regard to consequences and feelings.
Envious - Showing extreme cupidity; painfully desirous of another’s advantages; covetous, jealous.
Fierce - Marked by extreme intensity of emotions or convictions; inclined to react violently; fervid.
Fixated - In psychoanalytic theory, a strong attachment to a person or thing, especially such an attachment formed in childhood or infancy and manifested in immature or neurotic behavior that persists throughout life. Fetish, quirk, obsession, infatuation.
Flirt -To make playfully romantic or sexual overtures; behavior intended to arouse sexual interest. Minx. Tease.
Gruff - Brusque or stern in manner or appearance. Crusty, rough, surly.
Hard - A person who is difficult to deal with, manage, control, overcome, or understand. Hard emotions, hard hearted.
Impatient - Unable to wait patiently or tolerate delay; restless. Unable to endure irritation or opposition; intolerant.
Impish - Naughtily or annoyingly playful.
Judgmental - Inclined to make and form judgement's, especially moral or personal ones, based on one’s own opinions or impressions towards others/practices/groups/religions based on appearance, reputation, occupation, etc.
Masochist - The deriving of sexual gratification, or the tendency to derive sexual gratification, from being physically or emotionally abused. A willingness or tendency to subject oneself to unpleasant or trying experiences.
Obsessive - An unhealthy and compulsive preoccupation with something or someone.
Overconfident - Excessively confident; presumptuous.
Overprotective - To protect too much; coddle.
Perfectionist - A propensity for being displeased with anything that is not perfect or does not meet extremely high standards.
Pessimist - A tendency to stress the negative or unfavorable or to take the gloomiest possible view.
Phobic – They have a severe form of fear when it comes to this one thing. Examples: Dark, Spiders, Cats
Proud - Filled with or showing excessive self-esteem and will often shirk help from others for the sake of pride.
Rebellious - Defying or resisting some established authority, government, or tradition; insubordinate; inclined to rebel.
Reckless - Heedless. Headstrong. Foolhardy. Unthinking boldness, wild carelessness and disregard for consequences.
Remorseless - Without remorse; merciless; pitiless; relentless.
Rigorous - Rigidly accurate; allowing no deviation from a standard; demanding strict attention to rules and procedures.
Sadist - The deriving of sexual gratification or the tendency to derive sexual gratification from inflicting pain or emotional abuse on others. Deriving of pleasure, or the tendency to derive pleasure, from cruelty.
Sadomasochist - Both sadist and masochist combined.
Sarcastic - A subtle form of mockery in which an intended meaning is conveyed obliquely.
Spiteful - Showing malicious ill will and a desire to hurt; motivated by spite; vindictive person who will look for occasions for resentment. Vengeful.
Stubborn - Unreasonably, often perversely unyielding; bull-headed. Firmly resolved or determined; resolute.
Tactless - Lacking or showing a lack of what is fitting and considerate in dealing with others.
Temperamental - Moody, irritable, or sensitive. Excitable, volatile, emotional.
Withdrawn - Not friendly or Sociable. Aloof.