Ailoi was a member of the Chain. Ailoi kept his allegiance a secret when he lived among the People of the Open Sky. Ioile was of the same species as Ioile and Oioli.
In 2385, after the Children of the Open Sky arrived at Deep Space 9, Ailoi murdered Ioile. Ailoi used transwarp beaming technology to escape the station. (DS9 novel: The Missing)