History and Mythology*:
The constellation Scorpius represents the scorpion that was sent to kill the great hunter Orion. It hangs in the sky as a reminder that mortals can die and that pride goes before a fall (the scorpion having been sent to kill Orion after he bragged that he could [and would] kill any/all creatures).
Characteristics of Scorpios*:
intense, powerful, determined, sensitive, reserved, loyal, mysterious, cunning, ambitious
*Note: Information on Scorpio the scorpion was taken from Wikipedia