Shining Armor is her older brother.
Princess Cadance marries Twilight Sparkle's brother, Shining Armor.
Most likely not. Their relationship is not a romantic one. Depending on the interpretation, Spike is something like an adopted brother or adopted son to Twilight.
Most likely, she will.
There is a good chance of it. There is going to be a third movie, and the scene with the other Twilight appears to have been a sequel hook.
Lilac.
Princess Cadance marries Twilight Sparkle's brother, Shining Armor.
Twilight Sparkle's middle name is actually "Twilight". Her full name is Twilight Sparkle.
They are brother and sister.
Most likely not. Their relationship is not a romantic one. Depending on the interpretation, Spike is something like an adopted brother or adopted son to Twilight.
Most likely not, based off of the fact that Twilight is only Celestia's student, and never considered anything more. Since Luna is Celestia's sister that would mean since Twilight isn't shown to be related to Celestia, she can't be related to Luna. She is however related to Shining Armour. He is her brother.
Most likely, she will.
Lilac.
Twilight Sparkle
Twilight Sparkle
There is a good chance of it. There is going to be a third movie, and the scene with the other Twilight appears to have been a sequel hook.
Yes, Twilight Sparkle will live in the Castle of the Royal pony sisters when it is repaired.
Twilight infers a time of day when it is safe for vampires to come out and not sparkle. (: