Going back to chapter 115, I compared Kamui's original outfit to Subaru's. They are almost virtually identical. One can notice that there's a chain circling Subaru's right shoulder and ending in an attachment near the left shoulder. For Kamui, the chain circled his left shoulder and ended at the right one. Added to that, their pendants follow the same pattern. For Kamui, the white wing is on the left, while for Subaru the white wing is on the right. They truly are like yin and yang, two havles of the same whole. I hope Kamui changes back into that outfit. Then the vampiric siblings would truly look impressive together.
Somewhat odd to introduce Subaru at this time, what with everything else going on and virtually no one else paying much attention to him or Kamui. Oh well, perhaps there will be time enough later for the others to get to know the twins better.
Thinking about it, the two make an excellent team. Kamui seems to be the fierce, protective one. Subaru's probably the more mellow of the two and helps to keep Kamui in check. I just hope this saga doesn't end in tragedy for these particular versions of Subaru and Kamui. The other Kamui already suffered enough trauma in X, while that Subaru has accumulated quite a few psychological disorders through TB and X. Hopefully it won't end the same way. I doubt that this version of Seishirou will slay Kamui and thus traumatize Subaru, causing him to vow vengeance. Perhaps R! Syaoran will be able to befriend the vampire twins. It would be interesting to observe. They might all travel together. I had previously entertained an idea of C! Syaoran reverting to normal and R! Syaoran leaving with Kamui and Subaru.