|First Appearance:||Chapter 4|
|Affiliation:||Characters for the Background|
SeaTerror, also known as ST, is one of the characters for the background in the series.
SeaTerror has an Pedobear avatar. He also wears a bear costume with a zipper in the middle and a patch on his right side. This costume goes with his avatar.
He appears for the "Characters for the Background" in Chapter 4.
- He is the first featured user for the "Characters for the Background".