Sally 

She was trapped from the cage with lava defeat the huge floors and make the floors so bright when it’s gonna open the cage without you see the sign when diamond drew it is trap for Sally, but anyways, Sally’s Skin color is yellow and find a way to not cross the lava when it’s going so high if you go up to the floor, you did it but if you step on the lava, you’re out the game if you revive you got this