Female. Roni's best friend and Dr. Albert's assistant. A cat. Personal color: Orange. Cute and lovely. A bit of a worrier and playful. "Roni, is it okay to do this-nyang?" Ends her sentences with 'nya' or 'nyang'.

Male. Mac's best friend and Dr. Albert's assistant. A penguin. Personal color: Purple. Cute and lovely. Very playful and a bit prickly (somewhat blunt). "Mac, try following me, quack!" Ends his sentences with 'quack'.

Male. The scientist who hired Roni and Mac. Wears glasses. Has a bit of a temper but is quite funny. "Mac, Roni!! I told you not to do that!!" Speaks normally.

N/A The janitor(?) of this lab. A robot. Quite kind. "How may I help you?" Speaks in a robotic tone!!