Given the tenor of what we saw in PFH, it they're calling it a guardian, that makes me feel even more that it's tadpole in origin.
Larian really, really want us to make choices we otherwise likely wouldn't. I like it, but I suspect many won't, unless they've done an absolutely bang-up job of making that story so enjoyable it outweighs how upset people get for being "tricked" into making choices they wouldn't have wanted