The introduction of the characters is very brief, though only a few were highlighted in the anime It gives you the big picture that Koko is highly respected as a leader of the team. I think that most of the story will revolve on the evolution of Jonah and how Koko and her crew will change the way Jonah thinks about himself despite on what happened in his past.
The story doesn't have that direction yet but seeing how Koko and her team function as an arms dealer, this just means an everyday mission for each episodes of the anime. This typically ends with something that is morally striking that would hit your brain.
Jormungand is very fast paced and will certainly delight you because there's little time wasted for not so important parts. What I want to see in the upcoming episodes are in depth character introductions to answer my questions on why they respect Koko that much. The goal of attaining 'World Peace' by being an arms dealer may sound ridiculous but I think the author has something that he knows which makes Koko's point irrefutable.
My ideas seems to be a messed so I will write another post for Jormungand's final impressions when I finished watching the series or just make a review for it. For anime viewers looking for some gun-slinging action, this anime will fit the bill. I expect more from this anime and I hope that it won't disappoint on it's future episodes.