R7 Astromech Droid 8 

Rarity: Uncommon
Base: Small
Gender: It

Special Abilities

• Droid (Immune to critical hits; not subject to commander effects)
• Ion Shielding (Can ignore special abilities that affect only nonliving targets.)
• Override (At the end of its turn, this character can designate 1 door that it can see as open or closed; it remains open or closed until the end of this character's next turn, or until it is defeated)

Plo Koon and Ahsoka Tano both used prototype R7 droids during the Clone Wars.