Quick questions about a character I made

I made a character and I need help fixing them.

In what way do they need fixing?

I came up with a rough idea of their personality but that is all.

I see, well what rough idea have you got so far?

An ace character that is sort of a modern day bounty Hunter or assassin.

• flirt with others to get close to them. Close enough to at least distract or get their guard down.
• sarcastic all the time. Acts like they never take anything seriously. Especially when they are scared.
• not fearless but brave and scared enough to proceed through dangerous situations
• perceptive or observent of their surroundings always. When in somewhere new they like to look for all exits as they go through
• hates large crowds of people. Has slight anxiety and feels claustrophobic in those situations.
• nice and kind to their friends and will make sure to protect them.
• can hide all feelings when they need to. Or could display an emotion that is untrue.

(rough idea.)

Don't know just an idea

I still am trying to figure out looks gender and other stuff.

I think that some of the points you've come up with can make for interesting character personality, but properly think about what kind of role your character is going to have, and more importantly, why they have that role