Overwatch -

Including at least one character from specific Unicode sets (like Japanese or Korean) can change the entire font style of your Battletag.

Players often use special characters to trigger a unique "thin" or "wide" font effect for their names: Overwatch

Using accented letters (à, æ, ł) can also modify the appearance of your name. 🎙️ Character Voice Generators Including at least one character from specific Unicode

You can use specific codes in Overwatch chat to change colors or insert game icons: Overwatch