Temperance

Temperance is a ghost NPC introduced in The Sims 4: Paranormal Stuff. Temperance is a mean ghost that will randomly appear in haunted house with purpose to make it more difficult to raise spiritual volatility and make life of sims living in the house more difficult. She'll appear for the first time on the 5th night.

Once she appears, Temperance will begin creating more cursed objects, interrupting interactions with specters and extinguishing ghastly candles, alongside doing typical angry ghost interactions, such as scaring sims and destroying objects. Sims that are in the same room as Temperance will receive a scared moodlet.

To prevent Temperance from causing chaos, Sim can ask Guidry, which will grant the sim a small idol, which will distract Temperance and eventually, she will leave the lot. If Bonehilda is active on the lot, she will autonomously start fighting with Temperance (and will always win), forcing her to eventually leave the lot.

Temperance glows red, since she has a permanent very angry mood, which presumably means she died of a cardiac explosion. The mood is linked to the hidden trait in the same way as very sad mood is linked to the Night Wraith trait.

Trivia

 * She has an ongoing feud with Guidry, a former love interest, who she grew jealous of.
 * She can be interacted with and even befriended like every normal sim, but since she's in a permanent very angry mood, she'll reject most interactions and autonomously perform mean interactions in return, making it very difficult to build a relationship with her.
 * Temperance cannot be asked to join in group seances, even though Guidry and Bonehilda can.