Let me take the latest version 22.4.0 of Tik Tok as an example.
1. Open Tik Tok and enter the friends or watch list. My friends list (as shown below):
2. Choose friends who have been commented by us (as shown below):
3. Click the "three points" in the upper right corner (as shown in the figure below):
4. In the upper right corner of the new interface, you can see the original nickname of the other party (as shown below):