Possible Clues:

• Member in a register, scaremonger
• Creating needless worry
• Scaremonger putting body part in a roll
• One saying "The sky is falling!"
• Scaremonger having a large weapon is finally shot
• Overreacting sort
• Scary weapon seen in a catalogue
• Scaremonger gets top celebs to carry weapon
• Winged cloud is tending to cause panic
• A mistral devastated Cassandra