ICHIKCA AND FUMIYA ARE RELATED TO ZAC

Things to prove this theory

- Ichika and Zac both have blue eyes and blonde hair with two strips of red. Fumiya and Zac both have blonde hair.

- Zac and Fumiyo both think very highly of themselves. They also both lead their own teams. Fafnir and Zeutron also look alike, and are both stamina types.

-According to Beybeyblade Burst Wikki, Count night is Zac's brother. Count night is an expert thief. Fumiya's bey is Fafnir, which originally belonged to Free. It's possible that Count night might have stolen Fafnir and gave it to Fumiya. This also explains why Free didn't come and try to take Fafnir back from Fumiya; he was chasing down Count night, unaware that he already gave Fafnir to Fumiya.