Poor yohan. He's such a cliché cringy edgelord that i cannot hate him, he's just too cookie cut to inspire any feeling but boredom. Also, Idk if there is an error in translation or the author did a time loop. "In war, he lost everyone he loved" hence one would thing wife+children, and yet later we read "In his frenzy he killed even his children." Then either phrase 1 was supposed to be "In war, her lost the woman he loved", or it was him in his frenzy that got back in time and killed everyone. At this point, neither would surprise me.
@pikachyan: a vampire giving their blood creates a half vamp. If said half vamp gets blood from a pure blood they awaken special abilities and live longer. That's how all the apostoles of yohan lived more than 5 years and have incredibly ineffectual powers.