Kotarō Tomoe/Plot

Background
When Tomoe joined Border, he was in elementary school, and the youngest recruit at the time. Having been inspired by Kakizaki's desire to protect citizens two years earlier on TV, he decided to join Kakizaki Unit.

Large-Scale Invasion Arc
With the rest of his unit, he fights Lamvanein alongside Suzunari First, Azuma Unit, and Arafune Unit. The battle ends with their victory, and Kakizaki Unit is the only unit to not have lost a member. He is given an Outstanding Service Award for his efforts.

B-Rank Rank Battles Arc
His unit goes up against Tamakoma Second and Katori Unit in Round 5. When they enter the zone, he regroups with his team before approaching the two enemies. When Kakizaki Unit does confront the enemies, they begin shooting to pressure them. When the teams decide to head for Chika, his unit is stopped by Yūma. He puts up a brave fight, but ultimately loses, becoming the first to Bail Out.