Monolingual American here, what does that symbol mean in Japanese?
Basically, it's like a letter (Japanese doesn't use letters like in English, their symbols represent whole syllables (or whole words, dependig on writing system used) , ツ represents the syllable "tsu"). It doesn't really mean anything on its own, writing it at the end of a sentence would to a Japanese person unfamiliar with the usage as smiley look like you just inserted a random letter at the end, like "Hey, how are you? q"
Thanks. I wasn't sure it it was like an actual word or something.