A spirit channeler from the province of Andong in South Korea. Seoyun hails from the Natanado family who have long maintained the ancient traditions passed down from their ancestors in order to fight against the evil unseen spirits and entities of this world. The Natanados in particular are known for their special channeling technique that allows spirits to embody the channeler and use their body as their own. It was Seoyun’s own perfection of this technique that earned her her Ultimate title.

Seoyun herself is a somewhat dreary individual, constantly forced to think about death as she’s surrounded by the whispers of spirits. In a strange way however, she finds their presence comforting and is more uneased when she’s severed from their voices. She is frequently quick to the point and doesn’t bother with excessive details. She’s a strong purveyor of the belief that instinct will get you infinitely farther than logic ever will, something that frequently irks Evelyn.

She has a low dulcet tone to her voice that is prone to droning and sounds like she's constantly annoyed with the person she's speaking to. Any time she yells, it sounds like it takes a significant amount of effort for her. Optional Korean accent, though she does speak Korean on occasion.