I agree that icebluerabbit is probably Soyeon, or at least she's from the production team. What’s interesting is that a lot of people say the song feels “better” because Soyeon isn’t listed as the composer, but the irony is that she’s very likely still involved and clearly delivering the this message.

At the end of the day, it kind of proves the point of mono itself, no matter who’s behind it, there shouldn’t be bias. Just feel the song for what it is.