🟣英語で「マスク美人」は、look beautiful (pretty) with a (one’s) mask on のように表現できます。
◼️「彼女は、マスク美人です。」
●She looks beautiful with a mask on.
●She looks pretty with her mask on.
◼️「彼女は、マスク美人ですが、外すとそうでもない」
●She’s beautiful with her mask on, but when she takes it off, she’s not that pretty.
◼️「彼はマスクイケメンだ!」
●He looks handsome (attractive) with a mask on.
◼️「彼女は眼鏡美人です。」
●She looks beautiful with glasses on.