Mulcri will send an Eye down the third tunnel with instructions to stay hidden at the fork and return to her if it sees any creature not part of their own group. She will then join the ones heading towards the people who are awake. When they get close, she will again briefly check on them with her Third Eye before they proceed. "Strike when you will. I will try to keep the Dwarves calm."

Spoiler: Actions
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Initiative: (1d20+14)[33]

Mulcri will delay until the last of her team has done their actions, acting on the lowest of their initiative counts (or until the Giant is dead, whichever comes first). She will cast Mass Suggestion on the Dwarves (and also the Giant, because why not) and say in Dwarven: "Please remain calm. We are here to set you all free."

Will 29 negates.