Wide lowercase Cyrillic es, like a broad c, a historic variant letterform from Old Church Slavonic texts.
U+1C82CYRILLIC SMALL LETTER NARROW OU+1C84CYRILLIC SMALL LETTER TALL TEU+1C81CYRILLIC SMALL LETTER LONG-LEGGED DEU+1C85CYRILLIC SMALL LETTER THREE-LEGGED TEU+1C80CYRILLIC SMALL LETTER ROUNDED VEU+1C86CYRILLIC SMALL LETTER TALL HARD SIGNU+1C87CYRILLIC SMALL LETTER TALL YATU+1C88CYRILLIC SMALL LETTER UNBLENDED UKU+1C89CYRILLIC CAPITAL LETTER TJEU+1C8ACYRILLIC SMALL LETTER TJE11 characters in the Cyrillic Extended-C Unicode block.
U+1C80CYRILLIC SMALL LETTER ROUNDED VEU+1C81CYRILLIC SMALL LETTER LONG-LEGGED DEU+1C82CYRILLIC SMALL LETTER NARROW OU+1C83CYRILLIC SMALL LETTER WIDE ESU+1C84CYRILLIC SMALL LETTER TALL TEU+1C85CYRILLIC SMALL LETTER THREE-LEGGED TEU+1C86CYRILLIC SMALL LETTER TALL HARD SIGNU+1C87CYRILLIC SMALL LETTER TALL YATU+1C88CYRILLIC SMALL LETTER UNBLENDED UKU+1C89CYRILLIC CAPITAL LETTER TJEU+1C8ACYRILLIC SMALL LETTER TJE