Kyok and Mami may be alot longer since they met prior the main story, and stayed during Wraith arc.
And while we're at the past, is this not nostalgia?
That look on Syaro's face is interesting. It seems to me to suggest she feels she may have hurt Chiya - either by rejecting her after she stripped them both or by using her as a consolation prize after being rejected by Rize.