Secret Keeper/Playing With

Basic Trope: A character agrees to keep another character's secret.

• Straight: Alice discovers that her best friend, Kate, is a werewolf and agrees to keep it.
• Exaggerated: Alice is suspicious that Kate is hiding something from her so she follows her to discover her secret: she's a werewolf. Kate sees her and asks Alice if she can keep this from anybody which she agrees.
• Justified: Alice expect to call favors from Kate in the future.
  • Alice is a werewolf (or a ghoul, or a mage, or a changeling) too, and plans to tell Kate sometimes in the future... after Kate feels comfortable having her around.
• Inverted: Alice sells Kate's secret to the media.
  • An elaborate Masquerade is in place to make sure Alice, the only person who doesn't know Kate is a werewolf, never finds out.
• Subverted: Secret Secret Keeper
  • Alternately, Alice tells Bob that Kate is a werewolf.
• Double Subverted: ...but Kate eventually learns that Alice knows her secret and then asks her to keep it.
  • ...but then asks Bob to keep the secret, as well.
• Deconstructed: Alice is having a nervous breakdown over trying not to spill the beans. She becomes increasingly paranoid, misinterpreting everything she hears as a reference to Kate's furry little secret.
• Averted: Alice never finds out that Kate is a werewolf.
  • Or everybody knows that werewolves exist, and Kate happens to be one of them.
• Lampshaded: ?
• Invoked: Kate chooses Alice as a friend just so that she can keep her werewolfism a secret.
• Defied: ?
• Discused: "Don't worry, your secret's safe with me."
• Conversed: "Yeah, her secret's safe alright...but for how long??"