Henry

Henry was a popular student in Marshall High School which turned into a vampire by Richard Beesome.

Early Life
At some point after events in Alex Annie Alexis Ann, Richard eventually found him and turned him into a vampire. Richard and him eventually plotting a plan to kill Alex, but not before harming and killing every people that she loved.

Season 11
As Alex leaves school with her boyfriend Henry, one of her friends approaches her, having heard that she and Henry are in the lead for Prom Queen and King. Alex and Henry joke about it before Mr. Phelps walks by and reminds Alex about a test she has the next day. Alex is then picked up by Jody who is proud of her for fitting into a normal life. As they leave, Jody notices birth control pills in Alex's bag.

Returning home, Jody and Alex are surprised to find the Winchesters there, having been called in by Claire to Jody and Alex's annoyance as neither of them believe there's a monster around. At dinner, Alex tells the Winchesters that the weird things Claire has been hunting have been based off of a crime blog, prompting the annoyed Claire to reveal that Alex and Henry plan to sneak off to Jody's cabin to have sex, prompting Jody to give Alex a highly awkward sex talk. While talking to Dean, Jody tells him that things were rough with Alex for awhile, but she'd started to turn things around, even dating the most popular guy in school.

The next day, Alex and Henry arrive at school to find Mr. Phelps' body hanging upside down from the flagpole. School gets cancelled as a result and Alex leaves with Henry and they walk along a stream. Alex is distraught by Mr. Phelps' death as he'd believed in her and because of the way he died and tells Henry there's awful things out there. Alex admits she wasn't always the good person she is now and has done awful things in the past, remembering the terrible things she did while with Celia and her family of vampires. Henry reassures her that he doesn't care about her past and they kiss.

That night, Dean calls Alex asking where she is and tells her he's coming to pick her up as the custodian is a vampire. Alex tries to leave, telling Henry he needs to go but he attacks her, revealing himself to be a vampire.

Alex is dragged to the vampire nest where she discovers Claire Novak and Jody Mills tied up to her horror. The custodian, Richard Beesome, explains that three years before in O'Neill, Nebraska he had rescued her from a "sleezbag" outside a bar and gave her a ride home where her vampire family attacked him and turned him after which he went home and into a bloodlust that led to him slaughtering his own family. Alex tearfully apologizes, telling Richard she had no choice, but Richard points out she could've left him outside of the bar he found her at. Henry and Richard explain that Richard wanted revenge and wanted to do it by making her suffer. To this end, he turned Henry into a vampire and sent him after her. The plan was that once Henry built her up, Richard would tear her down by taking her teacher, boyfriend and family before they fed on her. Henry tells her that his affection for her was completely fake and makes fun of her, causing Alex to spit on him. Richard drags Claire over to feed on her and Alex confirms Jody's story that the Winchesters are hunters who killed Alex's entire nest. Alex is unable to convince Henry to help and offers herself up to help Richard and Henry feed like she did her old nest if they let Claire and Jody go. Richard says he'll take her up on her offer before starting to feed on Claire. However, sensing Sam nearby, the vampires leave to fight him. As Henry fights Sam, Richard grabs Sam's machete and prepares to kill Alex with it. Before he can, Claire stabs him in the back with a crowbar, distracting Richard long enough for Dean to decapitate him. Freed by Dean, Alex confronts the subdued Henry who tells her he should've "tapped that." Alex punches him before Claire cuts his head off with silver-coated machete.

Appearance

 * Season 11
 * Don't You Forget About Me