Alucard

Alucard fights with ferocity, and often extreme cruelty, rarely shooting to kill until his target has been completely disabled and humiliated. However, he does have some humanity left in him, as he is still capable of shedding tears and showing affection for those who are dear to him, taken by Alexander Anderson to mean that he is not completely lost. As he is essentially immortal and invulnerable, Alucard is very egotistical. He freely taunts and belittles his opponents, often allowing them to inflict seemingly fatal wounds before healing himself and counterattacking. One of his favorite methods of fighting is to allow himself to be blown to shreds before simply flowing back together. An example is shown in volume 2 when Alucard fights Luke Valentine. When Luke gains an advantage over Alucard, victory seems within his grasp. The tides turn when Alucard transforms a part of himself into a hellhound. Alucard then blows off both of Luke's legs with his guns before telling him to regenerate them, pick up his gun, and fight back. When Luke fails to do so, Alucard devours Luke, declaring him as little more than dog food.

https://hellsing.fandom.com/wiki/Alucard