The following is a list of characters that first appeared in the Australian soap opera Neighbours in 2009, by order of first appearance. They were all introduced by the show's executive producer Susan Bower. The 25th season of Neighbours began airing on 19 January 2009. Robert Mammone began appearing as Phil Andrews from early February and Donna Freedman's mother Cassandra Freedman also arrived that month. Former AFL player Clint Bizzell began appearing as Adam Clarke from March and Kaela Hilton joined as Melissa Evans. Sunny Lee, played by Hany Lee, arrived in April and a new generation of the Ramsay family, Kate, Harry and Sophie Ramsay, were introduced in May. June saw the birth of India Napier, the child of the established Declan Napier and Bridget Parker. July saw the introductions of Amanda Fowler and Josh Burns played by comedian, Scott Brennan. Sonya Mitchell, Jumilla Chandra and James Linden all arrived in August. Teenager, Robin Hester began appearing from September as did fashion designer, Saffron Jankievicz. Mia Zannis arrived in November.

Phil Andrews, played by Robert Mammone, made his first appearance on 9 February 2009. The character and Mammone's casting details were announced in the 3–9 January 2009 issue of TV Week. Of the character, a writer stated "Phil's a mysterious middle-aged man who has kept largely to himself since a family tragedy."

Phil finds Zeke Kinski after he is washed ashore following a rafting accident. Phil convinces Zeke that he is his father and Zeke, who is suffering from a Fugue state, believes him. While researching a story, Elle Robinson (Pippa Black) and Lucas Fitzgerald (Scott Major) find a drawing of Zeke at an artist's stall. After talking to the artist and taking the drawing, Elle and Lucas go to the Andrews farm to wait for Phil. Phil denies knowing the boy in the drawing and he hastily leaves in his truck, leaving Elle and Lucas behind. Elle and Lucas decide to break into Phil's house and they discover a boy's bedroom and one of Zeke's (Matthew Werkmeister) T-shirts. Elle takes the T-shirt, but later decides to return it. When she returns to put it back, she is shocked to find the room has been emptied. Elle goes to Susan Kennedy (Jackie Woodburne), who contacts Sergeant Rick Lawson (Liam Pederson). They go to a lock-up belonging to a friend of Phil's and he explains that Phil had lost his wife and son, Trent, in a car accident. When they eventually speak to Phil he insists he knows nothing about Zeke. Once they leave, Phil makes a call to his apparently dead son Trent, telling him to come home.

Zeke later finds some newspaper cuttings about the deaths of Phil's wife and son and becomes confused. Phil tells him that the newspaper had mixed him up with a friend of his that had died instead. Susan and Karl Kennedy (Alan Fletcher) go back to the lock-up and are stunned to find Zeke alive. Zeke insists that his name is Trent and that he was fine with Phil, the police are called and Phil is arrested. Zeke struggles with his return to Erinsborough and his friends take him to the lock-up, where he finally realises that Phil had lied to him. As he was about to leave, Phil walks in and apologises for what he had done to Zeke. Zeke is angry with him, but he then shook Phil's hand and thanks him for saving his life.

Cassandra Freedman, played by Tottie Goldsmith, is the mother of Donna, Tegan and Simon Freedman. She made her first on-screen appearance on 10 February 2009. Cassandra has been described as a troublesome Femme fatale, who is manipulative and selfish.

Adam Clarke, played by Clint Bizzell, made his first screen appearance on 20 March 2009. Bizzell's casting was publicised on 23 March 2009, although he joined the serial in late 2008 to film his five-week guest role. Bizzell's character, Adam, is an AFL champion, who "initially appears to be a good bloke". However, when Adam befriends Ringo Brown (Sam Clark), he quickly leads him astray.

Adam plays for the Portside Falcons football club and he has become a notorious figure with the press. Adam befriends new player Ringo Brown and he starts manipulating him. During the team's presentation, Adam invites Ringo back to his house for a party. Adam tells Ringo that he cannot bring his friends and that he should ditch them. During a night out, Ringo is told that he will have to go through an initiation. At Adam's house, he is told to strip naked and wait in the bathroom. When he comes out and finds everyone in the early hours of the morning, Adam tells him that he had passed the test. Ringo realises that he is running late for school and Adam offers him a lift in his car, which he also lets Ringo drive. They are pulled over by the police, but the police officer recognises Adam and lets them go. Adam goes into Ringo's school and charms his teacher.

Ringo breaks the rookie sprint record at the club and Adam decides to hire a room at Lassiter's Hotel and throws a party. Declan Napier (James Sorensen) receives complaints about the noise from the room and he eventually throws Adam and everyone else out. Ringo stays to clean up, but Adam returns and encourages Ringo to leave with him. Adam encourages Ringo to quit school to concentrate on his football career. Adam suggests that they go and choose a car for Ringo and during the ride, Adam loses control of his car and crashes into an Easter display. Adam tells Ringo to take the blame for the accident and he does. The press get hold of the story and Adam assures Ringo that everything will be fine. Zeke Kinski (Matthew Werkmeister) overhears them and broadcasts the details on his radio show. Adam and Ringo's coach, Nathan Black (Lyall Brooks) reprimands Adam and sacks Ringo.