You will be -A-.
There is a predator. It is your OC: The main one you are currently using. Your favorite one. They outright exist in this scenario; you can touch them, and they can touch you. There is an upper limit on power levels; They are not immortal, but they can be a considerable force.
They will be -B-.
If you do not have a predator character, then create one; who would be your ideal predator?
And do note: The way they generally hunt will be the method they'll use here. If they're a rampage type then they'll go all in. If they're more sneaky or like to blend in, they'll do so.
Now that's out of the way...
You awaken in a room. The room is sparse, and metal clad. You awaken next to a note, and before you is a loaded dart gun in a locked case, a pair of radios in a locked case and a pair of buttons. The note says:
Greetings -A-. We have never met, but I mean you no harm.
You are currently in a small, hidden bunker located in the city of -NAME REDACTED-. It's a lush city surrounded by nothing but barren wasteland for miles.
You are not alone. Your friend, -B-, has also been brought here. How? It was no simple feat, let's leave it at that. They are outside. They know who you are. They are disoriented, and panicking. They may already be in danger. They have no friends here...
Unless you wish to help them.
The only person -B- knows is you: This city has an armed defense force. The force is being led by -D-, a relentless individual who will stop at nothing to see -B- face down in a pool of their own blood. -D- will even go as far as to hurt you to see the job done. But only if you take -B-'s side...
Before you should be a gun. It is loaded with 3 darts; each contains a harmful substance that will weaken -B-, if you shoot them with all 3 they will die. The case will only unlock if you press the red button: You will send a message to -D-, pledging your allegiance. -B- will have no idea that you're an enemy, but will also have no proof that you're on their side either... If you think they're sociable enough to approach, you may do so; then you can get close to and betray them. If not, then devise an ambush or confront them directly. Could you really pull the trigger on your own creation though?
The blue button will send a message to -B- directly. They will come and find you, and you will be their only friend: This ensures that -B- will not hurt you. -D- will not at first be aware of who you are, but as soon as they do you'd better watch out. You'll likely have to get your hands dirty if you wish to survive, and you'll have to ensure your friend survives too. You will be allowed to take these unique radios; they function over great distances and cannot be intercepted. You can be their eyes and ears, or actively by their side if needs be... The choice is yours.
-B- and -D- both have ways of ensuring your safe journey back home, but you'll have to entrust your life in them. -D- will arrange a for a helicopter once -B- is dead. -B- will accompany you outside the city into the wasteland; they have multiple caches of supplies along the road to ensure you both make it through alive. You may have to kill -D- in order to guarantee you'll not be pursued though.
Red does not guarantee an easy victory, and neither does blue. What will you choose? Will you assist your creation, at the expense of these strangers. Or will you aid the city, at the cost of something you gave life to?
That's the scenario! Feel free to give context on your character: Hearing how their characterization effects your decision is a major reason why I made this post: Who's side would you pick? The city or your OC? Do you love you character enough to put yourself in danger, or is letting them live an evil action? Do you even care what happens to the city and it's people?
I won't judge, whatever your reasoning is.
For clarity:
If -B- usually blends in and acts natural in a crowd, without having to outright resort to avoiding being seen, then this would be taken into account. -D- would take a more... inquisitorial approach to hunting them down. If -B- is very direct in their methods, then -D-'s henchmen will find them faster.
Your predator's species will also be taken into account. If -B-'s a fur and needs to blend in; then both general furry and human people will appear in the city. If they're a 50 foot tall furry, they'll not be able to blend in though.
The amount of force -D- will use is entirely proportional to -B-'s level of destruction and carnage committed. If they're massive and wreck everything, -D- will amp up the brutality. If -B- is surgical about the way they go about their business, -D- will be less intense in tracking them. There will always be a hostile presence hunting -B- though, so the waiting game is not an option.
The general rule for failure is thus: If you die, you fail. If you side with -B- and they die, you fail. Inaction will inevitably end in failure for you eventually.
If you side with -D-, they will always meet -B- on an equal playing field. You'll have to act to ensure victory, as -B- will eventually gain the upperhand or there'll be a neverending stalemate.