Oh! Shellie Ames is agent 3, Coraline Reef Dallimore is agent 4, Yasumi styx is agent 8, Aaron styx and Hibiki are considered agent 7 and 5 in my storie's canon as they went through the entire Octo expansion story with Yasumi.
Ammianus Xavier is the main Neo agent 3, while his brother Bruno/Lil' buddy is Neo agent 3.25 and Violet L. Alterna is Agent 3.5! :)
That's all of my ocs that are in the Squidbeak splatoon! Altough some others like: Cade, Camille, Sam, Mike, Amanda and Gemma do help/live with some members of the splatoon they are not agents. Hope this is a good answer! :)