Rubble

Pebblebot and Rubble go to the same school. They became friends after Rubble stuck up for Pebblebot in the playground after some older kids tried to pick on him.

Tails is yet another kid at this school, though he is older and in another classroom. During recess, Tails is always playing pranks and messing with the younger kids. While he doesn't quite mean to, it can come across as cruel and mean.

Rubble is terrified of Charles. This strange doll seems to hop from room to room in the daycare, many different kids playing with it. Something about this doll gives off a bad vibe to Rubble.