Akari Hizamaru arrives at the scene, showcasing his evolved combat skills by slicing through a swarm of roaches to save civilians. He is now working with the Japanese government to track down the Terraformars' hidden headquarters.

The manga actually renumbered its chapters starting with Chapter 1 upon entering the Earth Arc (around Volume 18), treating it as a fresh start for the series.

The art and animation in Terra Formars: Earth-Hen Episode 1 are noteworthy. The series boasts a unique art style, blending elements of horror and science fiction. The design of the Terraformars is both fascinating and terrifying, making them a compelling aspect of the series.

Intercut with the raid is a sterile boardroom discussion in Japan. We meet the cold pragmatist Rolf . He is not a fighter; he is a chess master. He and his colleagues debate the viability of the Annex 1 project. The problem? The M.O. (Meteor Orthoptera) Procedure has a 60%+ fatality rate. For every soldier who survives the cellular grafting, two die screaming. The episode does not shy away from the grotesque footage of failed experiments. Rolf proposes a "solution": send death row inmates and volunteers from the third world—expendable assets. This is the first time the audience sees the chilling amorality of the Terra Formars government.

Ivan’s rampage touches on a primal fear: losing control of your own body. The Hercules beetle’s instinct is to crush. Ivan has to actively fight that instinct to spare his friends. This internal struggle—human reason vs. insect instinct—becomes the central conflict for every Terraformar soldier moving forward.