Comments of chapter undefined of Summoned by a Pretend Villainess

with this mysterious figure being mentioned, where they clearly have designs on Mona, i can't help but wonder if he might be the one behind the actual murders and the original Luna was merely that fall gal. although he gives me a stalker vibe. though, I kind of wonder what might happen next with the grand Duke in regards to Mona. I'm pretty sure he's going to be the love interest, but it's always fun to see how it occurs. anyway, on to the next chapter!