The Flash: 2 options for the mystery girl from Crisis on Earth-X wedding

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The Flash, Supergirl — “Crisis on Earth-X, Part 1” — SPG308b_0302.jpg — Pictured (L-R): Candice Patton as Iris West and Grant Gustin as Barry Allen — Photo: Bettina Strauss/The CW — © 2017 The CW Network, LLC. All Rights Reserved

During the first part of “Crisis on Earth-X,” a giddy girl approached Barry Allen before his wedding. Who was she and how could she be tied to The Flash?

“Crisis on Earth-X, Part 1” established the threat of the Nazi from Earth-X, who invaded Earth-1 and caused the Barry Allen-Iris West wedding to prematurely end. This set up Part 2 and everything that happened in the second hour of this crossover.

Before anything happened, a young, female waiter approached Barry, who was about to marry Iris. She seemed a bit giddy over their wedding, including telling the Scarlet Speedster to say “I do” at the altar and offering him a drink. “I’m really excited to be here. I mean, at a wedding! Any wedding! It just so happens to be your wedding,” said this mysterious girl.

This seemed like the first appearance of someone new to The Flash. Who, though, remains a mystery, but could be answered soon.

Could this girl be tied to Barry and Iris’ future? The show hasn’t provided an indication if Mrs. West-Allen is pregnant. Although it can happen in a future season or two down the road.

What if this girl isn’t tied to this super couple? That may leave even more questions, including who she’s related to and what her motivations are.

For the potential identity of this mystery girl, we narrowed it down to two options. They have comic-book ties to Barry and Iris, potentially one’s readers and viewers are familiar with. How would either option be able to get to the 21st century and witness this wedding, let alone know about it?

Let’s try to discover who this girl is: