Army is straightforward and has a plan for almost every occasion. When he doesn't, he and his team become uneasy, and they attempt to find data about the opposing team's strategy.
He becomes very obsessed with curry after his fight against Team Blue and therefore he carries a curry cookbook.
For this reason Goggles often calls him "Captain Curry".
He is replaced by Rider after he gets attacked by bees in Volume 9.
He is the first member of the S4.
His team's tactic is known as "Squid Net Manual", which is a manual with all of their battle tactics written in it. He and his team use it to understand and counter their opponents' tactics.