Number of people in each part of Kouki .

2 people

Part 2

(plus 3 people for Kouko)

Part 3

2 people (plus 4 people for Mitsuru Kaoru)

Part 4

5 people

Part 5

(plus 6 people for Milk)

Part 6

4 people

Part VII

4 people

Part VIII

4 people

Part IX

Five people

Part X

5 people

Part XI

Temporarily 4 people