Ellie is shown to be someone who is immune to some of the dangers of the post-apocalyptic world with the help of Joel. She and Joel had a close relationship but Ellie is being depicted as gay. This is a theme that is still not very common in computer games. One of the reasons why this has been done is probably because it shows how homosexuality is something that people know exist but are still unsure about.
Ellie’s character has immunity but has a lot of weaknesses. Homosexuality is considered “young” as compared to heterosexuality and the acceptance of the society in general.