April Young is the daughter of Pastor Young. She spends her childhood in Mystic Falls. After her mother's death, her father sends her to boarding school. Following her father's death, April returns to Mystic Falls where she learns about the existence of vampires.
Elena begins babysitting April and she often reads her own short stories to April. April loves writing because of this. April's friends with Elena's brother, Jeremy, and also meets her boyfriend, Matt. Her mother dies of cancer and soon afterwards her father sends her to boarding school. Some years later, he dies due to a gas leak and April returns to Mystic Falls.
Pastor Young mentions April to Elena, telling her that April still loves writing because of Elena.
April returns to town for her father's funeral. She sees Jeremy and Matt and tells them that she will be enrolling at Mystic Falls High School. They offer their condolences, but she isn't sure how to reply. Elena and Jeremy try to console her as she struggles to write a speech for her father's funeral. Connor finds April alone and stabs her, tying her up to bait the vampires out of hiding. Elena tries to rescue April but almost kills her instead, due to her bloodlust. However, Caroline stops Elena and teaches her to use compulsion. Elena then compels April to forget everything. Caroline feeds April her blood to heal her.
April goes to Rebekah's party and mentions to Elena that she believes there was more to her father's death than was originally let on; she says that her father could smell cigarette smoke on her, so voices her suspicions as to why he couldn't smell a gas leak. Rebekah teases April about the town being cursed. Rebekah wakes up the next morning to discover that April is the only person who stayed to clean up, deciding that she would rather clean up than go home. Rebekah's sympathetic towards April and offers to help her unearth the truth behind her father's death.
Matt finds April sitting alone at the Grill. She says that she's waiting for a friend. Rebekah then arrives. Noticing that April's interested in Matt, Rebekah says he's hers. Stefan shows up to talk to Rebekah, compelling April to forget their conversation.
April asks Matt if he knows where Rebekah is and claims to be worried about her. Connor takes April, Matt and Jeremy hostage in the Grill to draw out the vampires. Matt and April try to find an escape route, but Stefan saves them. April visits Caroline's house where Caroline compels her to forget the ordeal. She then meets up with Jeremy and Matt and Jeremy gives her his vervain bracelet. April gives them some information about Shane.
April and Shane talk to Matt and Jeremy at school, and when Shane leaves, April says there's something familiar about him. She witnesses his lecture on artefacts and remembers that her father guest lectured for one of his classes.
April enters the Miss Mystic Falls Pageant and asks Jeremy to be her escort. Elena and Caroline give her advice on which dress to wear, but when Damon disagrees with them, Elena changes her mind and they decide that she should wear the red dress, despite Caroline's protests for the blue one. Jeremy fails to turn up to the pageant, so Matt steps in to escort her at the last minute and they dance together. Jeremy later finds April and apologises for missing the dance, but says that he practiced beforehand anyway so that it would be right. He asks April why Shane's there and she says that he's a judge and was talking to her about her father's death. Jeremy tells her that her father died a hero. April is chosen as the new Miss Mystic Falls and is crowned by Caroline.
April finds Caroline unconscious on the bathroom floor and realises she has no pulse. As she tries to get help, Caroline wakes up and stops her. Caroline calls Stefan to tell him about Hayley, and mentions that Rebekah's body is in the cellar. Caroline then compels April to forget everything and leave. After remembering that April has vervain, Caroline tries to find her, but April goes to the cellar and finds Rebekah's body, pulling the dagger out.
Elena finds April crying and asks what's wrong. April reveals she knows that Elena's a vampire. Rebekah then snaps Elena's neck and, when Elena wakes up in the library, she tries to get April to leave with her. Rebekah stops them and compels Elena to stay. Later, April sits in the library with Rebekah, Stefan, Caroline and Elena; Rebekah compels them to be truthful. Soon, however, Rebekah sends April out of the room where she runs into Bonnie in the science lab. April reveals that she knows she's a witch. April helps Bonnie cast a protection spell on Shane, but in doing so, she accidentally links Shane to April. Kol tortures Shane by almost drowning him and stabbing him with a copper pipe, which April also experiences. Stefan and Elena find them and Stefan feeds April his blood to heal her. Bonnie takes April to safety. April later meets up with Sheriff Forbes and Mayor Hopkins at the Grill. She explains that it was impossible for her father to die the way he did and demands the truth.
When Bonnie talks to Shane, he reveals that April was the one who told Rudy and the sheriff about his involvement.
April calls Elena, looking for Jeremy, but Elena tells her that he's dead.
April joins the prom committee. Rebekah asks April if she can be made Prom Queen, but April refuses. Elena then threatens April into making Rebekah Prom Queen. After Bonnie becomes Prom Queen and Elena fails to kill her, she bangs April's head on a table and feeds on her before fleeing. Rebekah finds Matt cradling a dying April and he convinces her to heal April by feeding her blood to her. Matt then takes April home.
At first, April appears sweet, quirky and likeable. In later episodes after she discovers the supernatural world, she realizes she had been compelled and lied to and feels personally invaded. This sparks some attitude on her part towards her peers, with the exception of Rebekah, who offers her the truth. Despite the horrifying circumstances surrounding her, April keeps a brave face.
April is described as being beautiful with long, dark, wavy brown hair and blue eyes. She has very high cheek bones and a fair complexion. She also has a very petite and curvy figure. When she was younger, she had an "emo pixie cut" hairdo and braces.