Reading Six of Crows and ready for it to pick up

Okey, so I& #39;m gonna keep things as vague as a can but also, take caution for possible unintentional spoilers if anyone is readying this thread

So I spoiled myself on the fates of one of the characters (it happened cause I wanted to know the relationships of all the characters) and theyve only been introduced but I was hoping I wouldn& #39;t like them but I might like them? I& #39;m not sure yet but also were they in the

Grisha trilogy? should I have read that first (doesn& #39;t matter, I& #39;m already invested in this book) also things are starting to pick up finally