A few years back, I was into my billionth interest and decided to change my username to reference it. Giru was part of that username, and even after I changed it a few times, most folks still called me Giru. Kind of iconic now, I suppose? It's short, it stands out, it sounds nice in my opinion, and you could make a funny misspelling of it easily. I use it, or a variation of it, basically everywhere online now.
If anyone could figure out what the name Giru is referencing I would implode (it's not Dragon Ball).
Funny story, while I use Giru a lot online, I typically use another name in-game, which is Pika, or Pikari if that's taken in some kind of online game because it literally always is. Yes, it is in fact a Pikachu reference, as well as the origins of my custom cat's name (which is why I decided to mention it). I started using it back when I was like eight years old and I default to it all the time now. Which makes things kinda funny when there's a dire situation and the characters are yelling a name I came up with when I was a small child.