Summer Ranger is a fictional character from the British Channel 4 soap opera Hollyoaks, played by Rhiannon Clements. Clements' casting was announced on 19 October 2020, and the actress made her first appearance on 25 November 2020. Summer was introduced as the daughter of established character Cormac Ranger (James Gaddas). Two sides of Summer's personality have been explored since her introduction, with scenes showing her to have "sweetness and light" to her, while also possessing a nasty side. Digital Spy wrote that her introduction would have troubling consequences for Brody Hudson (Adam Woodward), Warren Fox (Jamie Lomas) and Felix Westwood (Richard Blackwood), all of whom were involved in an attack on her father. Summer was also billed as a "frenemy" for Sienna Blake (Anna Passey), with who she later forms a romantic connection. After her 12-month contract with the soap had ended, it was announced that Clements would be departing from Hollyoaks.

For her portrayal of Summer, Clements was nominated for the Newcomer award at the 26th National Television Awards. She has also been nominated in three categories at the upcoming Inside Soap Awards. Paul Fogarty of HITC noted that the actress had "made a huge impact on Hollyoaks" and that her character "has been an explosive presence" since her arrival. He also appreciated that her story arc had not revolved around her disability. Stephen Patterson of the Metro wrote that Clements has "well and truly made her mark as Hollyoaks' resident schemer" and that despite being new to the soap, she had "made herself right at home".

Details surrounding both the character and Rhiannon Clements' casting were announced exclusively by Digital Spy on 19 October 2020. A spokesperson for the soap said that Summer will seem "angelic on the outside", but that she is secretly a "mischievous minx". They also described her as "a bright, effortlessly cool tomboy" but said that "when she wants something, she's capable of going to extreme lengths to get it". Clements was "absolutely buzzing and extremely grateful" to be cast in Hollyoaks amidst the COVID-19 pandemic. She found her character to be fun and sarcastic and appreciated the "zest" and "bite" Summer has. Clements opined that Summer is an interesting role for her to play due to having two extremes to her personality; "sweetness and light" and a nastiness. She liked that there is a "juxtaposition to play with" and have Summer "presenting as one thing, but actually having the undertones of another thing". Clements explained that these aspects of her personality are caused by events in her backstory. She said that her backstory had not been explored fully since she had just arrived in the village, but confirmed that "there's a lot that's gone on in her past that informs the way she behaves". She opined that there are redeeming qualities to Summer, and that there are ways of redeeming her character for viewers, but it is down to what Summer wants, adding: "I don't think she's fully made up her mind over how far she wants to go." The actress also joked that she is jealous of her character's wardrobe.

Daniel Kilkelly of Digital Spy wrote that Summer's introduction would lead to trouble for Brody Hudson (Adam Woodward), Warren Fox (Jamie Lomas) and Felix Westwood (Richard Blackwood), since they are responsible for the death of her father Cormac (James Gaddas). Summer arrives in Hollyoaks village looking for Cormac, "much to the concern of Brody, Felix and Warren". It was also stated by Kilkelly that Summer would become a "frenemy" for Sienna Blake (Anna Passey), in scenes that would see Summer "give Sienna [...] a run for her money in life – and maybe love". Upon her arrival, she opens a baking business in the Grand Bazaar, which Kilkelly said would give her "a place right at the heart of the village".

In scenes that aired on Channel 4 on 25 November 2020, Summer arrives at Hollyoaks hospital to visit her father Cormac, where she meets Brody. Brody does initially not know Summer is related to Cormac, whom he put in a coma alongside Warren and Felix. Woodward, who portrays Brody, stated that when his character realises Summer's connection to Cormac, he feels "sheer panic" and tries to put the situation right. He gives Summer a job and does not feel concerned that she will discover the truth, but eventually as "the plot thickens and the story moves along", Summer begins to make realisations about what happened. In December 2020, the Metro reported that Brody may cheat on partner Sienna with Summer, since the pair were "getting closer". Summer plans to raise money for the children's home that Cormac worked at, so calls former residents of the home. Brody learns of her plans and becomes worried that she will contact Warren or Felix since they were residents.

In a scene with bisexual character Grace Black (Tamara Wall), Summer states that she does not consider gender when she is dating somebody. On representing Summer's sexuality in the series, Clements stated that the representation of minority groups is "a step in the right direction and there needs to be more of it on TV". She expressed her happiness with Summer having no label on her sexuality since it meant that there could be no stereotypes placed onto her character; she also praised Hollyoaks for their ongoing representation of minority groups. Viewers commented on the potential romantic pairing of Summer and Grace, which Clements described as "an interesting dynamic". She continued by saying that Grace and Summer's friendship is like nothing else that Summer has in the village, adding: "it'll be interesting to see what happens, you never know."

In January 2021, Summer overhears Sienna talking to Warren about the attack on her father. She concludes that Warren is responsible for the attack. Speaking to Inside Soap about her character's response to her discovery, Clements said that Summer will seek revenge for what Warren has done to her father. She explained that although her character is "meticulous", her revenge will "come out in different ways to how she anticipated". She confirmed that there would be a lot of upcoming material for her character and that there would be "a lot of twists and turns from her and for her". Clements also said that Summer develops romantic feelings for Brody and when she discovers that Sienna, Brody's partner, is having an affair with Warren, she plots to expose them. Clements explained that Summer has two motivations for exposing them; wanting them to take ownership of their actions and wanting to get close to Brody. She added that Brody not being with Sienna means she can develop their relationship "without Sienna being in the way". Summer takes photographs of Sienna and Warren together and posts them through Brody's letterbox; he ends their relationship and finds Summer is there "to mend his broken heart". She tells Brody that she wants to have sex with him with no strings attached, which he agrees to. Summer then brags to Sienna about having had sex with Brody. Summer begins to "dream of a future" with Brody and makes an "ally" out of Brody's best friend Damon Kinsella (Jacob Roberts), who she believes will influence Brody to get with her.

After Cormac dies, Summer learns that Brody initiated the attack and was a bystander. Clements stated that Summer "feels the most attacked" by Brody's involvement, since he has "lied to her face and manipulated her". As she feels Brody's involvement with Cormac's death is "more personal" than that of Warren and Felix, she begins to target him. Hollyoaks producers then revealed that there would be a shock shooting caused by Summer. Clements found out about the shooting just after she had been cast as Summer, as she had a meeting with the producers who outlined the plot details to her. After being sent "into complete meltdown", she finds a gun. Attempting to shoot Brody in the night, she accidentally shoots Sienna. On the misfire, Clements said that Summer likely feels regret rather than guilt. She explained that Summer's wish for revenge is still there and that she is annoyed that the shooting did not "exact in the way that she wanted it to". Clements felt that the shock shooting would be interesting for Summer since it shows her to be "out of control". Clements added that Summer uses Sienna's shooting to "manipulate things again". Summer feels she has to "lie low" and "deflect from the reality of what's happened by putting blame elsewhere" in order to carry out the rest of her revenge. Clements felt that viewers would be able to clearly see Summer's manipulation skills in the aftermath of the shooting, since she "tries to blame it on everything possible to try and cover up the facts". Clements explained Summer's thought process as: "Ah, what do I do know, and how do I make this situation work for me and how can I manipulate it even further?" After the shooting, Summer continues "her quest for vengeance" by plotting to make Brody fall in love with her and then "destroy his life".