Thread:Gokyr586/@comment-24440576-20160608142150

http://www.heroshock.com/?p=22866

Portrayed by Ryo Kimura, Argos is the first born son of the Gamma royal family, and thus, Alain’s first big brother.

For additional source... it's confirmed by Alain himself: https://twitter.com/hayato_isomura/status/740531789345611776 