Comby

"♫As long as you are combing...♫"

Comby is a Pebbles in the shape of a comb which Blue Diamond apparently makes use of when at her pool.

Appearance
Comby is a pebble who resembles a somewhat ornate comb. Whether or not Comby has willingly chosen to adopt a comb as her physical form or has simply been harvested remains unclear.

Trivia

 * While unmentioned in-episode, Comby was named in the credits of Familiar