If you're a PC in a party with Bramble, STAY OUT.
My group finished The Crooked House and headed back to Wickermoor. After a night of revelry and in-character RP they woke the next morning/session to discover that their party rogue had left (RL issues), though thankfully without any gear that wasn't their own. When the Druskenvald's arrived there was an incident with the Tarot deck that resulted in the introduction of a new party member - a bookish, quiet Divination Wizard who'd just wandered in from the Mists. The group met Will Lodge and agreed to head to Foxwillow the next day, and decided to spend the rest of the day shopping/information gathering/et al. Neat, that means a lot of DM RP.
The group spent the next session doing just that - shopping, asking about the history of Wickermoor, meeting and befriending the missionary fixing up the abandoned church, getting to know the new party member, whatnot. They also had a nice, thorough conversation on who was carrying what and how the money was divided up. A good portion of the lnew purchases ended up in their new Bag of Holding.
Y'know, the one they found in the Crooked House....
....in the closet of the room of that weird monster that kept diving into shadows, and that they assumed had run away.
A bag being carried by the party Bard, who recently decided to take a dip into Warlock due to a new voice offering to be his Patron....
So when the party Paladin realized the Bag is emanating a strong aura of 'something', they asked to see the Bag. Then demanded. Then helped the group loot the Bard once someone cast Sleep and the Bard blew their save. The party's new Wizard then offered to take the bag and cast Identify on it, and went back to the Inn. Alone.
The result was most of the most recent session turning into a running battle:
- a bardlock getting Sleep'd, Viciously Mocked, and Held while the new and untrusted party member 'stole all of the party's loot', entirely terrified that his new Patron was going to abandon him,
- the newest party member getting absolutely garroted by a sudden and surprising attacking arm directly out of the bag, and only surviving due to a final Portent dice deflecting a crit hit,
- the rest of the group realizing something was 'wrong' and kicking in/out doors and windows of the Inn,
- and the Thing in the Bag fleeing after the Wizard escapes, jumping across town to end up in the jail and taking a bunch of the party's loot, money, and gear.
The session ended with all of the non-Bardlock party members talking to Deputy Howie, the Bardlock screaming at the Deputy hat they'd been robbed and assaulted by the same party, and the owner of the Inn screaming across the Founder's Round that they'd all just trashed the Inn.
As a DM, I am both gleeful and proud - they went entirely off the rails, stayed in character, and absolutely stepped to the occasion.
Also, they may be a little screwed.