RaizarP
Bored and meaningless... If Rias was banished to the underworld after this, and only Sona remains now, after Riku uses Sona as bait Sona will probably also end up returning to the underworld. If that happens then the meeting of the 3 factions for peace, and the Khaos Brigade attack that Riku is waiting for will not happen, or at least not in Kuoh. After all, the meeting was only held there because there were Rias and Sona, sisters of the Demon King, and because it was neutral territory, which belongs neither to Heaven, Underworld, or Ravens, but to the Shinto faction. But since Riku has already chased RĂas away and Sona continues, I see no reason for them to use that territory where demons are considered undesirable thanks to what Rias did.