|Birthdate:||June 13 2009|
|Personality:||Headstrong and obstinate|
|Seiyu:||Masako Sugaya (1st)|
Yuri Nashiwa (2nd-Present)
Ganko Suwa is Mitsuo Suwa's younger sister.
As her given name can be read as stubborn. Ganko is likewise head strong and obstinate, although she is more known for tattling on Mitsuo to their mother.
Ganko has a short hair and wears dresses, commonly color yellow ones.
Ganko and Michiko were very close friends. They both love and play dolls together. One time, they trade things. Michiko trade her old dresses to Ganko for the exchange for a doll (which is a copy robot, one of the things of Perman).
Though siblings, they were always fighting each other. Ganko always give complaint to her mom from not cleaning his room through stealing food from the refrigerator (Due to that the Copy Robot usually eats dinner with the family). Ganko is only the many people who almost caught Mitsuo in the mask.