Yui Kasuga series caption first creator voiced name name nickname alias gender species nationality title relatives name name divider name name }} Yui Kasuga(春日結Kasuga Yui) is the main character of the anime and manga series Corrector Yui. Though she's a high-school student of dubious academic skill, Yui has shown skill and growth over the series as she assumes the secret on-line identity of "Corrector Yui".