He knew that he had no match.There were just too many of them, but that changed when Mika saw you.His only friend was unconscious and being held by another human.

Mika, despite being an incomplete vampire, was ready to make drastic decisions to bring you back.

even if it meant fighting against an army of humans or vampires. He didn't mind as long as he had you by his side, because you were the only thing keeping him sane.

In the end, He had no choice but to save you from everyone.