For English users:

If your target has a Japanese name, refer to the lowercase index corresponding to its first character in alphabetical writing.

If the target uses alphabetical name also in Japan, then refer to the Uppercase.

Example:

• “高嶺のなでしこ” (Takane no nadeshiko) … Follow the “t/c/d” link.
• “FRUITS ZIPPER” … Follow the “F” link (Uppercase).