The Name is Zero MegaMan: NT Warrior : Season 5 Episode 1

Lan struggles with the memories of Beyondard, but everyone becomes well-adjusted to returning home. Peace isn't maintained for long, however, when strange cyber weeds appear all over a factory in Sharo, and Raika is forced to deal with substantiated viruses. The same thing soon occurs in DenTech City, and upon the defeat of the viruses, Lan faces a strange humanoid being with long blond hair.