Meh, I'm more of an Aragorn fan...

https://piefed.world/post/529058

My girlfriend told me i should ask: “who/what is loss?”

That’s the comic that forms the basis for the second part of the phrase. en.wikipedia.org/wiki/Loss_(Ctrl%2BAlt%2BDel)

But it’s legos in that format, so the joke is actually Lego Loss, as in Legolas the Lord of the Rings character.

Loss (Ctrl+Alt+Del) - Wikipedia

Thank you. The amount of JPEG I couldn’t see they are legos and didn’t get it the actual joke.
Did you show this image to your girlfriend and ask her if she got the joke, only for her to give you this oblique reply? If so, that’s hilarious