Responses
Yeah, they're the same person. Asmodeus is originally from the world they are currently in. Kim wanted to test out, if Asmo confessed to her, would the stage 3 condition be met. That was the scene we saw in the beginning. Then, in the latter half, we see how Asmodeus became Kim's constellation. In which case, it was love at first sight and only convinced her to take him as a constellation after showing his true, pretty boy form.

I’m confused, is asmodeus the constellation? Who was the demon at the start of the chapter and the one at the end, cause the one at the start seems to be a demon from the world she’s in now and is considered a male target apparently, but then at the end it looks like the same dude but it’s the constellation? Did I miss something someone please explain it