I'm pretty sure she will go the ballad route with a DEBUT full of emotions!!!
Anyway, Once I read that she said that she had around 6 voices in her head to sing(not literal words, just writing what I can remember)
Based on what she said, It's true, Her voice can sound different in many songs, there's one voice of hers that sound really hot , "dominant" and kinda naughty (Kingdom Come,Sunny Side Up & Sassy***The on fire part***). I would love her having a sexy R&B DEBUT. Wouldn't that be SO GOOD'??? WAAAH.
Common. We expected Seohyun to debut with something softer and she appeared with "DON'T SAY NO" so anything is possible.