This is the Shayna Fan Club Membership Card. The earlier the issuance number, the more respect you garner from other members. Club members with a single-digit card number are referred to as Elite Guards, although they don't enjoy any particular benefits.
Attributes: Initial Jewels Up, DEX Up, Slash Evasion Up. Unlocks the Master Ability "Hurray for Girls!" when equipped on Alfred (Raises Missile ATK Power, AGI and Range +2 for three turns after appearing on map)