tripleS's newest member Seo Dahyun revealed through 'Reborn Rich' OST

On December 3, tripleS's newest member was uniquely revealed through an OST for the Korean drama 'Reborn Rich.' tripleS members are known to have different and unique introduction teasers whenever a new member is announced. 

tripleS fans are surprised by the very unique way of introducing the member. Especially since the member is still a trainee.

Seo Dahyun's face has not been revealed, but rather her identity is revealed through her voice.

What do you think of revealing members like this?