Why is there a small clear red triangle to the right hand side of some of my contacts

[Android Central Question]

Right now it's only one contact when I receive a call or receive a message or return one I have that red triangle on the right hand side with a! In the middle why I can't get rid of it

 

[B. Diddy]

Welcome to Android Central! Which phone? Are you seeing this in the messaging app only, or in the Contacts app?