What is this symbol and how do I get rid of it?

[Guest /u/Mdbutnomd]

https://preview.redd.it/me0f36e3q97e1.jpeg?width=640&crop=smart&auto=webp&s=55b896bcc0f92ab01993dbac1ab82ea240a3d14d

This appears in only one of my text messages (with one person). How did I get it here and how do I get rid of it? submitted by /u/Mdbutnomd [link] [comments]