QuirkyAngel
White Masquerade's Blue Oni
If Yoshinori does decide to join Dai Dai, they'd only have two people. They still wouldn't be able to participate.
Assuming Team 6 + 2 is still in operation, Nao would be willing to join their team if that happens. He's fine with whatever combination so long as it all works out.
Jun would prefer Kouta and not Dai Dai. Her ideal team would be Kouta-Nao-Jun, leaving Dai Dai-Yoshinori-Tsuyoi...which I don't imagine poor Yoshi would like too much.
Of course, if Yoshi refuses, Nao and Jun are either left to convince Dai Dai or find someone else^^