You can change your name by following the steps below:
1.) Open the in-game smartphone menu.
2.) Click or tap the main character's profile picture.
3.) On the next screen, click or tap the [...] located on the upper right of the profile picture.
4.) Select [Change Name].
5.) Enter a new name, then press [OK].
※ If you no longer want to change your name, click or tap anywhere on the screen to return to the previous screen.
Please note that if you press [OK] without entering a new name, your free name change will still be consumed, so please be careful. For the second name change and beyond, you will need 200 Meta Jewels every time.