[The Long eared bat]

The figure looks to be holding a cloak of invisibility which gave me this idea:
When (Gideon) or any small or medium figure that you control adjacent to (Gideon), is targeted with a normal attack from an opponent's figure, you may roll the 20-sided die. If you roll a 15? or higher (Gideon) or a chosen adjacent figure cannot be attacked by the targeting figure.

Another idea is that he could have a ranged sheild hurl special attack.