I'm thinking it's just a trope power so it only works for the ML that needs it. Yk the usual "only she can calm my curse! It's because she's my true love!" So in the sense of the powers everyone one else has, she technically does not have a power like them.
That or major spoiler ahead!!
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Shes actually the reincarnation of the goddess of healing magic. She doesn't fully know that yet.

could anyone explain natalie’s power?? They said she doesnt have any power but how did she calm down the duke dude’s power? i dont mind spoilers
also whats wit the natalie shouldnt receive any affection
and sharon getting sicker and frailer?