sentences:  The Death Busters' intentions then change to harvesting Heart Crystals en masse to resurrect the malevolent entity known as Mistress 9.Chibiusa also befriends a sickly girl named Hotaru, unaware that she is the daughter of the Death Busters' leader, Professor Tomoe.Unknown to her, Hotaru is also Sailor Saturn, a Sailor Soldier capable of destroying and rebirthing entire planets.