After Daimon stored the ship, he followed the girls to the cave, they returned just on time as the rain started to fall, gusts of wind howled and the overall temperature went down quite fast.
Daimon sealed the entrance of the cave with a large rock and then touched the wall of the cave, without the Risha girls noticing it he covered the outside of the cave with a layer of metal, to prevent the water from flooding them.
He then turned around and was once again surrounded by those three, their expressions clearly said they wouldn't leave this matter slip.
Still given his current relationship with them, Daimon wasn't going to give them a detailed explanation, just something to soothe their curiosity.