there is a small skeleton named sans there is a big skeleton named papyrus sans is the older skeleton and papyrus is younger than sans frisk is a teen she is 15 and Chara is 18 most people think that they are sisters but there not there is a mountain that wen people go on the top of the mountain they never come back Tori is the queen of the monsters and asgor is the king of the monsters they had a kid named asrial h was the prince of the monsters. in my next book I will tell you about undertale