How does Ralph, jack, Simon, piggy, and percival describe the beastie in chapter 5?

The Littlun; “I was asleep when the twisty things were fighting and when they went away I was awake, and I saw something big and horrid moving in the trees.”

Percival; “.....says the beast comes out of the sea.”

Jack- a pig

Simon- “What I mean is. . . maybe it’s only us.”

Ralph and Piggy don't believe there's a beast.