She sings like how a rat would.

The only time it sort of fit was in Likey. Like am I the only one that find her voice squeaky and just... not appealing?

I honestly think the only reason she got into Twice was her dancing skills because her voice is atrocious. I literally cringed when her line came up in More and More.

Edit: I'M OT9!!! I don't hate Momo in the slightest, I love all of them equally and my bias always changing between them. This is just my opinion on her singing alone, but I love that girl to death don't get me wrong.