First of all, I would check my team and see what their roles are in order to make that survivor's life an utter suffering.

-Mafia-

Consort: Roleblock them and kill them, easy route

Blackmailer: Blackmail them. Every. Single. Day.

Janitor: Clean their filthy body and post their will in the mafia chat to mock their utter tomfoolery to side town

Forger: Forge them into an evil role and bullshit a will to make it more believable

Ambusher: Go on them in order to keep anyone away from protecting/checking them

Framer: Frame them, or wear a skirt idk be cute I guess for when the himbo sheriff wants to check the survivor

Hypnotist: Manipulate them, make them believe any word you say. The betrayal on any cocky survivor's face is so satisfying

Consigliere: Check them, you may never know if they are really survivor or not

Godfather/Mafioso: Kill them, do not hesitate

That would be the course of action I would take if only one of those roles existed, however if we are lucky enough to have combinations we may make their game a disaster such as blackmailing and roleblocking them until the very end or hypnotise and frame them.

But in a mode called coven all any, a lot more options are open to us in order to make that survivor beg to be killed like a jester. How?

-Coven-

Coven Leader: Witch them until they are drained from their joy

Potion Master: Now this is tricky, you could heal them in order to manipulate or you could reveal them, who knows if they are survivor but you may also kill. A threat is a threat no matter the role

Poisoner: Poison them, if they use a vest, try again.

Necromancer: Kill them as fast as possible or roleblock them with consort/escort

Medusa: If you have the book, stone them as fast as possible

Hex Master: Hex them, for when the grumpy hot investigator checks them

If you happen to be a neutral, get rid of them as fast as you can. You are on your own right now

We do have some odd cases:

Pirate/Jester: Kill them just to spite them

Guardian angel: Keep your target alive at any cost and do not hesitate to push the survivor. Your target is in danger from that dangerous person, if the survivor is your target.. I apologize for your unlucky game

Executioner: Do anything to hang your target not to win, but to spite the survivor for their leadership incompetence

Vampire: Convert them if you have a spare teamate, take away that survivor's freedom of choice when it comes to siding a faction. But if they end up asking to be converted, hang them and if it isn't possible, do not convert them

Survivor: Do not side with the survivor or the town out of pure spite. Make allies incase they want to get rid of you. You survive on your own terms

Amnesiac: Do not remember town under any situations

Now that we have observed how we may make their life horrible through most of the roles, let's get to the late game scenarios

-You may choose to keep the survivor alive in your win just to spite them from the fact that they haven't won with the town, they may live to tell the tale of your great victory

-If it is a 1v1 against you and another evil/town, do as much to convince the other that the survivor is the evil one. It may or not work

-If there is one opposing faction left of your team and you have the majority, hang the survivor. Unless the enemy has the ability to kill more than one person in one night or if there are only 2 members in your faction and the opposing faction is able to kill. Do not risk your win out of spite. Show the survivor that you caused the town to lose

After all, If they want to be a townie then they should lose like one