It is ein's fullstop mark, and she's said so in this thread, so you know it is now as well. It is not affecting the sentence anymore than no punctuation does. If you're so irritated about a single character then use the dang ignore function already, G-Flex.
Why do you have to be so irritated by my being irritated? I mean, I know I irritate easily, but enough people have sympathized with me here that it's not like I'm an isolated case. A significant amount of people find it aggravating. And when I think someone is doing something aggravating, I think the reasonable thing to do is let them know.
Strictly speaking, it does affect it more than no punctuation does, because a lack of a meaningful symbol doesn't necessarily trip me up as much, or in the same way, as a symbol whose meaning is unclear. If I say "I'm leaving tomorrow", that's a different sort of ambiguity (where I am leaving to?) than saying "I'm leaving to go to fnord tomorrow" (what or where is "fnord"?). There's also the fact that I'm very much used to seeing text with no end-of-sentence punctuation on the Internet, because it's fairly common and doesn't really result in confusion, whereas tildes-as-full-stops isn't something I've seen at all. I think she's getting it from that overused-in-anime-and-fansubs Japanese thing where you use a tilde/wave-dash to elongate the vowel sound at the end of a word, but Christ, not even they use it as a stop. Oddly enough, it seems like her communicative style in
general is heavily derived from bad Engrish fansub-type language, which is something I find incredibly bizarre and sort of fascinating from a linguistic/sociological point of view.