Yuika is a member of the WWW. She first appears in Central Town advertising a dance festival at central area 3. Once there, she uses CircusMan.EXE to drain the energy out of the NetNavis there. She catches one Cybeast but not the other. Then she runs after the Netpolice arrive. Yuika takes part in a mission to capture MegaMan.EXE and is sucessful. Then Yuika, Vic, and Ito break away from the WWW and form their own group. But they lose MegaMan.EXE and have to retreat. They show up again to kidnap Iris.EXE and are sucessful. Once they have Iris, Baryl tries to rescue her but the ex WWW members beat him up and are about to kill him when Joe Mach shows up and drives them away. Yuika and the others appear again during the final battle against Lan. Their NetNavis are deleted but they are about to attack Lan themselves when Chaud, Mayl, Dex, Yai, Mick and Tab show up. Yuika, Ito and Vic jump off the pavilion and are knocked unconscious. They are later arrested for their crimes.Blackbeard live in Beyondard and work for the Beyondard Dr. Wily.