noun
effeminate male celebrity or comedian persona
Slang term for a male celebrity or comedian who adopts an effeminate persona, often characterized by feminine mannerisms, speech patterns, and style. Typically used in entertainment contexts.
あの芸人はお姉キャラで人気を集めている。
That comedian is popular for his effeminate persona.
バラエティ番組にはよくお姉キャラのタレントが出演する。
Variety shows often feature celebrities with effeminate personas.
キャラ means 'character' or 'persona'. お姉キャラ combines this with お姉 to denote a specific type of character.
Compound of お姉 (slang for an effeminate man) and キャラ (short for キャラクター, 'character'). The exact origin is uncertain, but it likely emerged in Japanese entertainment media to describe a stock character type.