O is for Orphans, namely the vampire orphans of Palmer Orphanage. Annabelle and Thomas meet them in London while she searches for her brother in NIGHT CHILDREN: DARK CHANGES.
Known History:In London, when the vampire Rake known as Ryan turned teacher Molly O' Connell, she was upset. She rejected him so he captured five of her students and turned them into vampires in their sleep. Molly gathered them and escaped Ryan's clutches. She found an abandoned building in the heart of London where they could hide. She named their home the Palmer Orphanage after a famous vampire hunter. It was her way of rejecting their new life. Despite her feelings, Molly continued to teach the children what little she knew.
The American vampires Annabelle Foresight and Thomas Dunston were running from vampire hunter Hawke. They stumbled upon the orphanage and Molly gave them shelter. Annabelle and Thomas soon moved in with the orphans and eventually everyone relocated to Germany's Black Forest where they joined up with the Mullo vampire gypsy tribe.
Who they are:Mary Stilton(Age 16)
Eric (Age 14)
Selina and Samuel (Age 10)
Charlotte (Age 7)
Here are some pics of vampire children and teens I've found on the web...