In the history of SM Entertainment’s girl groups, who would you consider the second‑ and third‑greatest centers?

If Yoona from Girls’ Generation is widely seen as SM’s most legendary center, then who comes next in the ranking?

Would it be Krystal from f(x)?

Irene from Red Velvet?

Karina from aespa?

Or maybe Ian from HEARTS2HEARTS,

anyone else?

who’s just too adorable?