If the girl is in monster mode, giving her a pacify doll will calm her down for a while (The time depends on how many marked dolls have already been burnt - The more dolls you burn, smaller are her calm times);
If she's attacking another player, giving the girl a pacify doll will save him and stun her for a while;
Burning a pacify doll awards you an achievement;
There's a pacify doll in each bedroom and bathroom, one in the kitchen, one in the internal garden and another one near the first stair;
It's useless giving her a pacify doll if there's only one marked doll remaining