From what Solomon was talking to himself about, it seels Amschel made these 'Nosferatu' Chiropterans in the lab. It might explain why they felt inferior, they're copies. They seem to only be strong and fast, lacking most of the skills that make Chevaliers and Saya so dangerous. And someone had to make those wepons for them.

Question: Where are Haji and Saya going? Are they still in Russia or are they near where Kai's gf and the reporter are?