Fictional characters with Wikipedia pages written almost like the pages of real people.

Here's an example:

Ethel Roberta Louise Mae Mertz (née Potter) is one of the four main fictional characters in the highly popular 1950s American television sitcom I Love Lucy, played by Vivian Vance....

Born around 1905 in Albuquerque, New Mexico, where her father, Will Potter, owned a sweet shop and soda fountain with the slogan "You can lick our cones, but you can't beat our sodas!" Ethel has had a career in music and acting, yet got her start at Albuquerque's Little Theater, singing her signature number "Shortnin' Bread". A flapper in the 1920s, she met and married Fred Mertz either in 1933 (episode #2) or 1927 (episode #42)... Their wedding anniversary date is May 3rd (episode #121). After eloping (episode #113 - "Ethel's Hometown") Ethel worked in vaudeville with Fred before settling down and purchasing their own brownstone apartment building in New York City, containing the apartment they rent to Ricky and Lucy. ...

She has a fine soprano voice, among other artistic talents, but unlike Lucy is now unambitious and content as a housewife and landlady. Somewhat lonely, she is devoted to Lucy and her family. Despite her commonsense outlook, she is often fascinated by the possibilities for excitement opened up by Lucy's mad schemes. Although continually complaining about Fred's penny-pinching and other faults, she defers to him far more than Lucy does to Ricky....

Now, this article is is flagged with an exclamation mark and "This television-related article describes a work or element of fiction in a primarily in-universe style." Going to the link, I see:

The problem with in-universe perspective

An in-universe perspective describes the narrative from the perspective of characters within the fictional universe, treating it as if it were real and ignoring real-world context and sourced analysis. The threshold of what constitutes in-universe writing is making any effort to re-create or uphold the illusion of the original fiction by omitting real-world info.

Many fan wikis and fan websites... take this approach, but it should not be used for Wikipedia articles. An in-universe perspective is inaccurate and misleading, inviting unverifiable original research. Most importantly, in-universe perspective defies community consensus as to what we do not want Wikipedia to be or become....

What an amazing effort Wikipedia is. I was charmed by the elements of what I now know is called the in-universe perspective, and now I also see how it conflicts with the grand enterprise of Wikipedia and the mechanisms of arriving at and enforcing the community consensus of what Wikipedia is or should be.

Why did I look up Ethel Mertz? 1. Meade asked me if I got his joke in the "Purchase of the Day" post.  2. I grudgingly admitted that I knew the song "Hey, Look Me Over," but I didn't think many readers would get it. 3. I played this YouTube of Lucille Ball singing the Broadway tune "Hey, Look Me Over," because I thought it would make Meade laugh because we laughed a lot 2 nights ago when I streamed "Lucy Thinks Ricky Is Trying To Murder Her" on my iPad and we've been referring to it ever since. 4. YouTube prompted me to play "Lucille Ball Loved her Ford Skyliner Retractable Hardtop," which included a segment with Fred and Ethel doing a song-and-dance routine. 5. I said "Weren't Fred and Ethel in vaudeville before they became landlords?"

Google, Wikipedia, YouTube, Amazon streaming video, iPads, cars with retractable hardtops, television, Broadway, vaudeville... I love America.