You've trained for many years and are experienced with tracking, hunting, and killing your enemies for a reward. People know not to mess with you due to your ability to fight and kill. 

Skill Proficiencies: Intimidation, Stealth

Tool Proficiencies: One type of gaming set, poisoner's kit

Languages: elvish, thieves tongue

Equipment: A dagger, a set of dark common clothes including a hood, and a pouch containing 30 gp

Suggested Characteristics

d8	Personality Trait
1	Everything I do has a reason, even if it is a dumb reason.
2	I am a blank page. I show no emotion and only speak simply or don't speak at all.
3	When I get into a new location, I learn everything I can about it from secret passages, citizens and their history, and any criminal contacts.
4	There is either ally or prey.
5	I show kindness before I fight. I don't want situations to be worse than they need to be unless provoked.
6	I hardly pay attention to conversation unless it's able to be used against my prey.
7	If there is money involved, I'm in.
8	I always try to be the leader of any group and give the orders.

d6	Ideal
1	Justice. Only the guilty deserve to be hunted. (Lawful)
2	Hunter. I don't hunt for wealth, but for fun. (Chaotic)
3	Charity. My earnings go to the people. (Good)
4	Pitiless. Whoever I kill deserved it. (Evil)
5	Professional. I kill who I'm supposed to. No questions. (Neutral)
6	Know-it-all. Who is my target? Where do they live? What's their family history? Etc. (Good)

d6	Bond
1	I must pay a heavy debt and this is all I'm good at for money.
2	A special someone of mine is dying, I must support them and their family.
3	I once lost someone I was supposed to kill for a very good reward. I must find them and take the reward for myself.
4	My name will be etched into the walls of hell. Everyone must fear my name.
5	I had to run away from my home for a crime. Should I return?
6	I once had a partner work with me, but I made a mistake and they are dead now. I must redeem myself and honor their name.

d6	Flaw
1	Once I see my prey, the hunt is on. No food, drinks, etc. until it is done. That will be my reward for a successful kill.
2	I choose to not have many friends, they'll probably get killed.
3	I have to plan for anything. If there is one thing that occurs which doesn't go to plan, I will not forgive myself for not planning for it.
4	I tend to lie a lot, I barely know what the truth is.
5	I can never leave a battle until it is done. My ancestors will never forgive me.
6	If someone has a bounty on their head, I look for that person until they are dead.