Old Border

Old Border (旧 ボーダー) refers to Border before it went public and prior to the death of 10 of its initial members.

History
Before it became publicly-known, Border was a secret organization with the purpose of being an intermediary between ‘Earth’ and Neighbors. To realize this goal, Border made an Alliance with three nations in the Neighborhood.

During its peak, Old Border has 19 people within its ranks. However, about five years before the start of the series, one of the allied nation was invaded by a hostile nation, and when Borders sent its forces to assist, 10 out of 19 members died, with some became Black Triggers. After the incident, the remaining members separated themselves into two groups, one went on and establish the current HQ while the other stayed and establish Tamakoma Branch.

Legacy
Following its separation, most of its foundations were taken by Tamakoma Branch. This includes the building it uses as headquarters, the emblem and its goal.