You're from an alternate world and you're a pony princess there and the crown actually has a magical element embedded in it that helps power up other magical elements and without it they don't work anymore and you need them to help protect your magical world
あなたは別世界から来た ポニーのプリンセスで... 王冠には魔法のエレメントが ついていて... それで他のエレメントを起動する