Aura

An Aura (オーラ) is an energy barrier found throughout the Mega Man Battle Network and Mega Man Star Force series. Certain viruses, such as Megalian and Scuttlest family, wield auras. Auras can also be used by NetNavis and EM Beings as a Battle Chip and Battle Card. Bass is also known to wield auras.

Auras are capable of deflecting all attacks up to a certain threshold, above which the Aura disappears after blocking off one hit from said attack. Some Auras have elemental alignments, where they immediately disappear after getting hit by their weakness regardless of how strong it was. Certain Wind-based attacks and Battle Chips are also capable of automatically removing Auras regardless of their strength.

Battle Chips by Game
None of the Aura Battle Chips causes damage.