Pop

ポップ

Pop, the Chief Executive Officer of the video game company "Leek Cartridge" (which is bad), transforms into the grey bunny Seratonin by using the "digital clock wind" wristband. Upon transforming, she says "Come out, Seratonin!" and is able to call wild birds with a whistle. She is the dark-skinned girl who always wears hats. She is typically the one who devises the plan to defeat the monsters. Seratonin is the chemical in the brain that causes happiness.
-bio taken from Wikipedia