User blog comment:Sunako30/Who is your top five strongest characters in owari no seraph in your opinion/@comment-33177490-20160102170840/@comment-25942629-20160103132015

No. Krul turned her into a vampire, and she drinks human blood right away. This makes her even stronger than before. As I understand, she fights Guren and co. in that state and utterly trounces them. The summary for volume 6 is fairly complete.