Text gifs are pretty much fanfics in text format.

Similar to the following:

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Akashi Seijuro
Yo bro
U know u shawt af right

Levi Ackerman
Says u
You got a bunch of titans
On your team

Player Bouchard
You two are only a few inches taller
And one of you is a forty-year-old man!

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Text fics have most of the dialogue in a fashion that portrays something like messenger or Insta dms.

1. Make sure to explain at least a little bit of the plot before engaging in text if it takes up most of the book.

2. Texts are mostly goofy and almost anything can become 'realistic' if you portray the character enough.
But something to remember is usually humor.

3. Make distinct usernames. You don't want the reader to be confused with the users (unless that's the point)

I know some of the tips (even if it's just three) are obvious.

Hope you liked it?