What a very interesting take! It is true, Milo does have a lot of yandere tendencies, even before Eris meets him, so it is very likely that no matter who he attached on, his yandere tendencies would only grow, but to what degree, that remains to be seen.
Same, that's why I made this game! I think that this concept should be more explored in yandere media.
No, I think that's an absolutely adorable nickname, haha.