NC for this. I'm really worried about the toxic influence a friend of DfD. She becomes almost a different person around them, more sweaty, confrontational, disaffected, in the park till late, drinking etc etc. She seems to be trauma bonded to this person as they were there at a very difficult time in her life. The influnec they have over her is so strong that a comment from them can ruin events that DfD was looking forward to. They 'helpfully' arrange surprises that interfere with other plans with budding friendships so they are destroyed, deliberately sabotage planned activities (the last one by encouraging an all night 'spontaneous' sleepover with zero sleep the day before a great opportunity that ended up coming to naught because she was wrecked). This other person has no other friends, has a very complicated family dynamic and is not someone others warm to because their behaviour is best described as challenging and unpleasant. It wouldn't be so bad if it was a positive dynamic between the two but they communicate through insults, viscous banter, lots of swearing and bitching about others. Any support woukd be welcomed.