Before splat 3, most of the Splatoon saw it as something that was suspicious, but non-threatening.
You can imagine how they feel after Mr.Grizz and all though.

Lion has always despised it, same with Venus.

Serafina used to do jobs in splat 2 and before she became agent 6...but learned the truth and kinda, tapered away from it.

Nami never really knew about it before splat 3 (for reasons), and got chills even stepping near it once she arrived in Splatsville.
Riptyde was the same.

Shelly got most of her injuries from there, but still continues to be a hard worker.

Memory dislikes it severely. Just from what she's heard and seen in visions.

Most of them fear the salmonid kings (especially horroboros) but Lion has great respect for em. Mainly because of what Venus tells him about their society.
Dez thinks that Joe's pretty cool tho.