Home beyond the portal

Long ago two male beings from another realm came to our earth and procreated with two women. The women ended up having to beautiful baby girls named Aiden Armenia and Asher Black, but little did they know, their lives would never be normal. Eventually, both girls ended up in the same Academy for orphans called The Guild. The Guild transforms these orphans into Assassins, by making them strong, fast, and ruthless especially when it comes to killing. You see, the girls weren't originally orphans, they lived with there mothers until they both mysteriously died. No one knows exactly why they died, all they know is that the mothers were covered in strange markings. The only thing running through these girls minds at this point is Revenge. One night both girls experience a strange dream about a portal being ripped open and something familiar was calling to them on the other side. What happens when the girls find out about there origins and what happens when an entire realm is relying on them to save it?