Legend of Zelda is a 38 year old series throughout which every single mainline entry has had an MC known as Link. Everyone knows who Link is, even a lot of people who've never played Zelda know who Link is.
Most AVN players pick a name and stick with it every single game they play. I've got about 500 GBs of AVNs in my hell folder, there ain't no way in hell I'm going to remember the default MC name for all of those. Either I call him MC and everyone knows who I'm talking about, call him the default name and almost nobody knows who I'm talking about, or call him Big Dick so only I know who I'm talking about.
You can call the MC whatever you want but if you want people to have the faintest clue what you're talking about you should probably just refer to them as "MC".