[As suspected, Soundwave isn't waiting for her in her suite. He's already left. Whether the resort has kicked him out by the time she gets here or he's still around but went into hiding, who knows unless Monika looks for him. Regardless, she's met with an empty room.
At the very least it seems there are some items in the room that weren't there before.
On the broken chair she may find three items: a blue rose from the flower field, a smooth stone from their treasure hunting, and a crumpled piece of paper. The last item, in particular, suggests that Soundwave had intended to throw it away, but instead he left it behind along with the flower and stone. If Monika straightens the paper, she'll find his austere writing - "Wait for me"]
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At the very least it seems there are some items in the room that weren't there before.
On the broken chair she may find three items: a blue rose from the flower field, a smooth stone from their treasure hunting, and a crumpled piece of paper. The last item, in particular, suggests that Soundwave had intended to throw it away, but instead he left it behind along with the flower and stone. If Monika straightens the paper, she'll find his austere writing - "Wait for me"]