Vivian having a totally normal reaction after knowing the new waifus working with Lord Phaethon.
Personally? I wish we had a little more of "cold Vivian" instead of the "dere dere Vivian" we get 90% of the time when going on dates and trust events.
While its funny seeing how she fawns over the proxies, it gets a little too much after a while... However, if we take this to the next level she becomes the perfect yandere. She's one of the characters I had the most fun drawing because you can easily distort her obsession into horror material.
Ah, and of course my headcanon is that Wise is totally oblivious about this. He's the quintenssential harem protagonist of the 2000's anime: he's not even aware of his own rizz and about the many girls falling for him XD