You've trained all your career be the most efficient spy and mercenary there is.  Starting from a young age you've trained in the ways of the ninja, the ways of stealth and misdirection.  Every shinobi is deadly in their own right and the true lethality of every shinobi is that everyone's fighting style is unique and different and you've honed your skills and proficiencies to their absolute max.  Whether you're a fresh out of the training gates, or an experienced shinobi, you know the ways of stealth and misdirection as any shinobi does and is a lethal weapon when given the right task.

Skill Proficiencies: Stealth, Acrobatics

Tool Proficiencies: One type of artisan's tools, poisoner's kit.

Equipment: A shinobi uniform (including a black jumpsuit, green vest, and a metal headband with your village's symbol on it), a case with 5 sheets of parchment, a bottle of ink and a pen, a souvenir from a lost friend (a dagger, their headband, or a picture of them with you), and a pouch containing 8 gp.

Suggested Characteristics

True shinobi are loyal to their teammates and make the strongest friends out there through trying times and tough battles.  Losses of battles or friends only makes those friendships stronger and through competing with each other you and your friends only become stronger.  A rogue shinobi mostly only trusts themselves.  They might be loyal as well but to something or someone else, an ideology, belief, or group of other rogue shinobi who share a common goal.  Shinobi are often the toughest mentally out of any group, seeing hardship and loss throughout their life, but that also makes them the strongest friend when they open up to you.