The Onyx Greeting Association is an unofficial greeter group on the Viridian ocean. The association mainly consists of officers from the flag Imperial Coalition. The main base of OGA operations is on Tigerleaf Mountain, as this is the flag's home isle, and because it is separated from the rest of the ocean. Their official uniform color is lime as suggested by a members poll. The group was founded by Cronogenesis of the crew Polaris Borealis. Although the OGA are unofficial they are supported by a few official greeters