While your Twitter username can only contain letters, numbers and underscores, your Twitter display name, which appears next to your username in tweets and on your profile, can include special characters. These special symbols can include accented characters or small shapes such as a heart or star. These shapes are known as glyphs. Your computer's installed fonts determine which symbols you can type and see.
Click "Start" > "All Programs > "Accessories" > "System Tools" > "Character Map."
Click on the symbol that you want to use.
Click "Copy." The symbol is now copied to your clipboard.
Log into Twitter.
Click your name in the top right corner. Click "Settings."
Click the "Profile" tab.
Click inside the name box where you want the symbol to appear.
Press "Ctrl" + "V."
Click "Save." The symbol now appears within your name.
Search the glyphs in Character Map by checking "Advanced View." Enter your search terms, such as square or heart, in the box and click "Search."
Glyphs may not appear on all users' monitors, in text messages or in third-party Twitter clients.