Aqua Current touches the head of another Duel Avatar with her head. This the ability to erase the memory of the victim, the limit that can be erased is unknown, and it is unknown whether it is permanent or reversible. The only known instance of Aqua Current using this skill is on Silver Crow after they have their Tag Team battles.
In computer programming, a memory leak is when a program continuously uses more and more memory. Usually due to not freeing up old memory that is no longer used.