I think Twice is called Twice because of their duality
@JYPETWICE~A thread~

https://abs.twimg.com/emoji/v2/... draggable="false" alt="๐ถ" title="Face without mouth" aria-label="Emoji: Face without mouth">

https://abs.twimg.com/emoji/v2/... draggable="false" alt="๐ณ" title="Flushed face" aria-label="Emoji: Flushed face">