Spears have existed in one form or another for more than 500,000 years. It was not until around 20,000 B.C. that Horsemen begain to use spears as a ranged weapon. Broad bladed spears were made to prevent the blade from penetrating too far and to keep it from being easily pulled from the wound. The wide blade also makes for easier parrying.
The Broad Bladed Spear is your Personas Weapon of Choice. As an extension of your Persona, Weapons of Choice may not be removed from play, even if you are playing a Generic Immortal. You may only have one Weapon of Choice in play.
If the last defense you play is a Back Away, you may still play Basic Attacks as normal during your Attack Phase. You cannot make Hidden attacks.