Trust the current game interface
Limits and validation rules can change by game version or region. The counter and error messages shown in your client are more reliable than a fixed number quoted by an outside tool.
Unicode length can be surprising
A symbol that looks like one shape can contain multiple code points. Combining marks can also increase technical length without adding obvious width. Keep decorative names short and test them before confirming.
A practical approach
Begin with a short base name, add only one decoration, and keep a plain alternative ready. Readability is usually more valuable than filling every available position.