Mention "the home plate lady" to any moderate-to-hardcore Blue Jays fan and they'll likely know who you're talking about.

Well, actually they'll be able to picture her. No one, it seems, knows her name or who she is. But the mysterious woman has had the best seats in the ballpark for at least a decade according to one Jays fan on Twitter.

<a href="https://twitter.com/CBCharlsie">@CBCharlsie</a> <a href="https://twitter.com/JoeyBats19">@JoeyBats19</a> <a href="https://twitter.com/BlueJays">@BlueJays</a> <a href="https://twitter.com/CBCToronto">@CBCToronto</a> They did an article on her once... I call her Aunt Bea! Remember seeing since 2005 😉 —@RepublicOfK

Her almost constant presence at Jays home games has led fans down a rabbit hole of theories.

The most prominent of which are that she's Mrs. Ted Rogers (wife of former president and CEO of Rogers Communications) or the woman who won the contest to name the park the SkyDome back in 1987 or an unknown long-time season ticket holder.

Turns out the third, not-so-flashy theory is the truth. CBC News spoke with the woman ahead of Tuesday's game against the Yankees.

The Jays fan didn't want her identity revealed, but confirmed she's had season tickets behind home plate for years, and doesn't have any special connection to the baseball club.

The mysterious woman was back for another season at the home opener on Friday against the Boston Red Sox. (MLB/Sportsnet)

Blue Jays fans had plenty of theories

Many believed the woman was Ted Rogers' widow, Loretta, or Kellie Watson, the woman who named the stadium SkyDome back in 1987.

Watson does, however, have free tickets for life to every event at the now renamed Rogers Centre.

For many Blue Jays fans, the mystery is part of the fun.

I love the game, but I don't do the wave. —@HomePlateLady

Welcome back to my kingdom —@BlueJays_Queen

I've just realized the man with the white chain ALSO has a stuffed parrot. Geddy Lee never has the crazies near him. Not fair. <a href="https://twitter.com/hashtag/bluejays?src=hash">#bluejays</a> —@Homeplate_Lady

Some have dubbed the fan "Grandma Blue Jay" or "Baseball Grandma." Curious fans have gone so far as to create not one, but three fake Twitter accounts for the home-plate lady, musing on her thoughts as she watches games from the seats all fans wish they had.

Pitcher Marcus Stroman hadn't noticed her, he admitted (You know, probably too busy focusing on the game).

Marcus Stroman is going to keep an eye out for the mystery home plate lady on Thursday. (CBC)

But he said he will look out for her during Thursday's game.

"I don't have any hints. We'll find out Thursday, maybe," the young Jays ace told CBC News.