Gems until the anniversary...

What's with this big giveaway right before the anniversary for the main male character event? Is the management team just getting warmed up? Based on the anniversary character order, it went Blade Line → Axion Gate → Orange, so I thought the next would be Six, but with this many male characters, the anniversary is likely to be female characters... Since Sen Shi (千紫) has had quite a few limited releases related to the main story of Souretsu (叢裂), maybe it's Otter Trade (オッター貿易)? But Otter just had Summer Minus released as a limited character recently... As a long shot, Maze Lab or Lindwurm are possibilities, but it seems unlikely they'd release an anniversary limited character before the members are even complete... Hmm, I don't know 😭 I want both Summer Error and Summer Three 😭😭