Why?

It has to do with japanese and the translation. In japanese, you almost never use words like "you" "he" "she". So people just adress another person with their name. The translation just let it stay like that instead of changing the third person speaking style to "you".
I hope, this explanation helped!(⌒▽⌒)

Hm...... really? but don't they use anata omae and some other stuff too? but you might be right I was just saying that it's kinda annoying since he's an adult and stuff... I'm more used to it when kids talk like that but an adult... not so much haha thanks for the explanation anyway

You're right, omae, kimi, anata and so on does mean "you", but is almost never used in normal japanese conversations. In the two years I have lived in Japan, I've often heard it in anime etc, but rarely in real conversation. Ironically, kids tend to use kimi and omae more often, for adult, it's depicted as kind of rude to use it (depending on situation). But I do understand it's kind of weird when you're not used to it haha

ohh now I see lol interesting to know... I though he was trying to act "cute" for him and I find that annoying haha but now I know that's not the case lol