Penguin Kun

No one knows when did Penguin joined Kyokakai, maybe he joined since the founding of Kyokakai?
Although he doesn't look very smart, he is actually a skilled military strategist.
For the new leader 'Sosuke', on one hand, he guides him as his senior to learn the benefits and responsibilities of a leader, and on the other hand he's doing his best at running Kyokakai with little manpower.