Shindong's tweet :
IntroducingFriendthroughTwitter -----> @Choi_SW the 4th member Finally 4!!!! pls follow him everyone ㅎㅎ
Cr: TwELFS twitter
And on the other hand, Rainbow leader also tweeted that Goo Woori just made a twitter account as well
adela1991 @ DKPopNews