R2-D2

If you've never argued about R2-D2 being the top fantasy/sci-fi sidekick, you've never experienced real fandom. This astromech droid doesn't just save the galaxy; he does it with style—whistles, beeps, and all. Ever noticed how R2’s basically the Swiss Army knife of robots but still gets stuck being the comic relief? Fans literally lose their minds trying to defend his MVP status against newer, shinier sidekicks. It’s a tough galaxy for a small droid with big heart.