about the power scale, you're wrong yes violet has 21 years old but her power is comparable to a 500 old vampire........ the count form double your power not your actual age but the author use age as an example and because vampires can grow stronger the more they become older but vampires like victor is irregular the same as violet who is daughter of a count and one of the strongest families ...... even Eleonor Adrasteia is count even when she is 26 years old and can kill any 1000 years vampires easily without the count form