I need ideas

I'm trying to create a character who's cool, not like in a captain of the cheer squad cool, more like if you insult them you'll be die within the week. I'll answer any questions so just ask.

Give permission to view the character, and maybe I can help.

Try doing a badass like character. Someone who wears leather and black sunglasses, whose gaze can kill you if they want it to. Make them a sort of superhero sort of villain. Make them have a cool name and sentimental backstory. And a pet snake or lizard. And ride a motorcycle.

Try doing a badass like character. Someone who wears leather and black sunglasses, whose gaze can kill you if they want it to. Make them a sort of superhero sort of villain. Make them have a cool name and sentimental backstory. And a pet snake or lizard. And ride a motorcycle.

She/he can seem really sweet and nice and all Hufflepuff goodness, but if you cross them, they will RUIN your life.
Like, the person bakes cookies for everyone, helps people with their homework, listens to people's problems and gives advice pretty much 24/7.
BUT, if you do something mean or truly heinous, the person will plan out something elaborate and plain wicked to ruin your life and cause endless pain.
This person may seem slightly crazy but if you think about it, he/she is actually pretty fair.

Seemingly normal every day person/people who have abilities. Ex; A mind reading teacher who can read each of her students's thoughts so that she can see who is falling behind and needs more help.