а я не смотрела MLP, но интересно же.

[yuuu]

кто может обьяснить, что это значит?

отсюда
про Эплджек есть еще немного текста (см. ниже), а остальные?

Full personality description:
A real hard worker you are, yup. If there's one thing you hate, it's being inactive or coming across as lazy. You'll put in more effort than anyone else, even if it may be against your better judgement or even if delagating your work is a smarter option. It's not surprising to see you working all day long, even if it's to help friends out. However, friendship is still important to you, so you will always, always stick to your commitments and keep your promises.
You're a tell-it-like-it-is pony, not holding your tongue and telling whoever whatever's on your mind or what your true thoughts are. Thankfully, you can still pick your words carefully and still keep some sensitivity towards what you say. But, others may find you irritable in appearance if you're not getting your way or you feel against something.
You are also most likely to be athletic and into staying fit, knowing that if you're not, you won't be able to keep up with your work. Fashion and looking good aren't on the top of your priorities, to say the least. You also tend to be very protective of your friends, standing up for them against anyone who is causing them problems, and usually succeeding in warding off any foes. You'd gladly lose a limb if it meant saving a friend's life.