Krone Westenra is the wife of Atilla, the mother of Magda Westenra and Lucinda Westenra, the grandmother of Ingrid Dracula and Wolfie, and the adoptive grandmother of Vladimir. She, as well as her husband Atilla, are very strict about vampire tradition (e.g. Wearing a cape at all times, not getting out of your coffin until sunset). She is also a member of the Vampire High Council.
Before the beginning of the first series of Young Dracula, the Dracula family (Count Dracula, Vlad and Ingrid, as well as Renfield and Zoltan) fled Transylvania after their castle was stormed by an angry peasant mob. Being a strict vampire, Krone saw this as being very against vampire ways to run away from breathers and tried to make them stay. Though he did not speak, it is implied her husband agreed with her.
However the Draculas still left and Krone and Atilla never forgave the Count for not staying in Transylvania, as it brought shame to the entire family, with them becoming known back in the home country as "Dracu-losers".
The next time she encountered the Dracula's, was when she visited the Dracula household once on Vlad's 13th birthday, where she and her husband not only forcefully attempted to give a 13 year old Vlad his powers 3 years early (through drinking the blood of a Transylvanian vampire bat), a scheme which very nearly worked, but also repeatedly threatened to report the Count to the Grand High Vampire.
Luckily though, the combined efforts of Vlad, and Ingrid promptly sent their estranged grandparents back to Transylvania, and to top it off the Count, tired of being threatened by her, told her to "Flap off back to Transylvania... you old bat," before giving a laugh of delight.