Cy

"We Are Doremi High's Yokai Investigation Team That Under The Study Of Yokais"

Cy is one of Manny old Classmates and Leader of Yokai Investigation Squad in Class 3-5 who has a sourceful upon learning about Yokais which Manny even don't think of

And He was very personal with Manny of knowing the Knowledge of Ghosts why also his good trusted friend was a hybrid which on do so, Cy realized that Manny was wearing a Yokai Watch since after He set Whisper free from the ball but definitely according to him He witnessed the battle between Manny and Sharknado alongside with the others Duelists