This door is neither trapped nor locked and is easily opened. Looking inside, outside light once again fills this bedroom. Looking out the western window, you can see the sun moving ever closer to the horizon. Much smaller than the last room with a smaller bed but still adorning the luxurious pillows and linens as seen in the other, a much smaller throw rug lies next to the bed and opposite that is a large, ornate chest. An empty table sits directly to your right as you look into the room. 

Zane, you do not hear anything within the room.

Rel walks up to tap Lana on the shoulder once more, giving her Guidance again.

She then peeks through and fires a half-hearted Eldritch Blast at the smaller rug and at the large chest, just in case.  If no result, she retreats again and lets the others get on with their search of the room.

Lana nodded gratefully to the helping magic and curiously stepped into the room. "Oh, more pillows to throw down. Still don't think it would help with landing but it sure is fun to toss them from the balcony."

She looked around searching for anything interesting, pulling out the drawers, should there be some. (Perception: 7 Investigation: 15)

Tex takes a careful look around for a magic aura in the smaller bedroom, then if there isn’t any, he’ll join Zane on the other side.

Tex

 Lana

Lana first pointed at the drawer with three locks and the three keys above and then said it out loud. "A trap with a twist. I bet if we guess wrong, something nasty will try to bite our heads off. Do we still want to try?" The answer was obvious, of course, so she bit her lower lip thinking hard. "All three things are kind of a mark of a vampire, right? But why such strange numbers?"

Never particularly good at puzzles, and not realizing Lana has probably already figured it out, Rel casts Guidance on herself and gets a fierce scowl of concentration on her face, her dark earrings swinging as she turns her head to stare off in thought.

Finally after a long moment, she asks "Bat, 3 letters, Fang, 4 letters, Coffin, 6 letters?  That is all that I can think of."

“That makes sense to me,” agrees Tex with Rel. “Shall we try that? Maybe best only one of tries with the others at a safe distance in case something does go wrong.”

Bellamy enters the room. "Well done Rel as I think you figured out the mystery of the lock and keys."

Once the others back away if they want to Bellamy will insert and turn the keys in the order Rel mentioned.

Zane, on the other side of the balcony, is super bored and as the last moments of the silence are about to expire he will go and kick over the brazier that stood between the two statues.

First, inserting the Bat key into lock number 3, you turn and hear it click as you begin to hear a mechanism within winding. Throwing your focus off for but a moment, you continue on. Inserting the fang key into lock 4, he hear another click as now a carnivalistic melody begins to play. A strange chest indeed. Moving on to the final lock, you take the coffin key and insert it. Turning the last lock, the music stops and as you reach to open the lid of the chest, it suddenly flings open with surprising speed and out pops a, for lack of a better description, "count chocula like" vampire puppet, with an audible cackling. The puppet springs about for a moment before setting still.

Bellamy Wis Save

8 rolled in game log

Bellamy is shocked by the surprise and stumbles back before tripping and falling on his bum.

"What the..."

WIs save: 17

Tex, suddenly alert, inspects Bellamy and the happenings in the room, “You’re alright? That came as a surprise.”

Rel WIS Save:  17

After a moment of surprise, Rel also moves forward to help Bellamy up, murmuring for her father's divine Guidance and looking around the room in case the puppet is a distraction for something else.

Perception plus Guidance:  12 + 4 = 16

"Yeah I am fine, just caught me by surprise" says Bellamy as he takes Rel's hand to stand again.

Wisdom save DC10: 21

"Yea, good thinking..." began Lana when the spooky puppet jumped out. She did not jump up, probably because she was expecting something, but was very surprised. "Don't know whether to laugh or cry here. It's getting weirder by the minute. Did they plan to give the potential thief a heart attack? Or is there something under the puppet or inside it?"

As bizarre as the thing looked it did not look that scary (now) so Lana dared to look closer, poke the puppet and check if there is anything else under/behind/inside of it. (Investigation 7 with Guydence)

Lana, poking the puppet you can tell that the balance is off, heavier than you would think a puppet to be, hinting that something may be inside. 

Rel, you do not notice anybody or anything else arouse by the sounds of the 'dracula-in-the-box'

"Oh! There is something inside." Lana tried to pull up the puppet out of the box. "How do you take this thing apart? Would be a pity to break this cutie." ("Cutie" could probably work as a scarecrow in its free time, but the tiefling found it somewhat charming)