Talk:Sōgetsu/@comment-5780397-20160323012220

Speculation Time: I think Sogetsu is actually weaker than Scorpion, Kogetsu and Raygust, and that it was one of the first Attacker Triggers which were then rendered obsolete. Chapters 26 and 27 imply that before the current 3, there were other Attacker Triggers. In fact, before Scorpion was invented, Kogetsu was not the most popular Attacker Trigger, but Raygust (if it already existed) was said to be unpopular; this means that there had to be at least one more Trigger. Since Konami was one of the first Border members, it is not impossible she has decided to keep using the outdated model with which she has the most experience.

If you think about it, Sogetsu was not stated to be a Tamakoma Trigger: that would be Connector. It also has  a shorter reach than Kogetsu, but apparently it cannot be moulded like Scorpion. That is why I think it was rendered obsolete by the three current models. Perhaps exactly because it is overall weaker, it is easier to combine two with Connector.