While Tendou is the "cool" factor, is the emotional anchor. Episode 1 introduces Kagami as a hardworking but slightly clumsy member of ZECT (the secret organization fighting the Worms).
Watching the for the first time feels like a metaphor for shedding the expectations of others to reveal who you were always meant to be. kamen rider kabuto episode 1
But then, Tendou presses the button on the Kabuto Zecter. While Tendou is the "cool" factor, is the emotional anchor