The phrase best grill is long-running anime fandom slang, a deliberate misspelling of best girl used to praise a favourite character in polls, edits and comment threads. This Emi version circulates as a short shareable clip for expressing that preference without explaining the joke. It stays popular because the wording is instantly readable to anime fans, works with almost any Emi image or ranking format, and signals playful partisanship rather than a serious argument about the character.