A vampire in my time, a lamia, is a woman with the body of a serpent and the head and breasts of a woman. She feeds on the blood of children. It's a Greek legend. I do not know everything about the Bachiyr. I was not meant to be turned so all I have learned I have learned on my own.
To become a Bachiyr you must be fed upon by one and then drink their blood in return. I do not know if you have to die and then wake again but that is what happened to me. We must drink human blood and it must be fresh. Animal blood does nothing and old blood makes us sick. I learned that one the hard way. We are stronger, faster and more agile than humans and we have enhanced senses. We must sleep during the day. Sunlight will kill us, as will fire and beheading. We can use the blood we consume to... do things. I discovered that if I will the blood within me to my legs I can run even faster and for longer. If I draw it away from my wrists and hands I can make them smaller and escape from any bonds that may have been put on me. There is undoubtedly more but I am still learning.
I was a legionary under the command of the Centurion Marcus. We were based in Jerusalem to keep order in that part of the Empire or at least as much order as anyone could there.