Nikolai Wolkow's Links
Nikolai his true little sister.
As the first born he made it his responsibility to keep the family from danger and keep everything at peace. He sworn to protect his baby sister at any cost which soon will turn out to be rather difficult as his sister herself is a danger.
This did not stop him to offer her guidance, even after seeing her malicious acts, such as torturing and harming living beings. After all she was born infected with an hostile DNA strain, she was not herself, right?
As time went on soon the great inferno happened, unleashing Katyusha true nature. Witnessing how spoiled she actually was left him with only one possible choice, taking out his beloved sister to end her misery and purify her legacy so that she will not be remembered as the girl who slaughtered an entire town in her killing spree.
His vow has yet to be fulfilled as she is always one step ahead, leaving great destruction and biological weapons which may not be revealed to the world, but he will not rest until he find her and till he put her to sleep.