This quirk allows you to gain knowledge from books and basically rip off the letters of a page and stuff them into your opponent's esophagus.
But seriously, you could really do some damage to someone. You could depress them, make them happy, make them angry, and inspire them.
This quirk makes it easy to reach people without trying. Students with this quirk know a lot about people. They chose their words carefully.
I mean, you could be pretty dangerous. You can adjust the size, font, and how they take in the words can be controlled, too. Students with this quirk are also the smart one, since, you know..books? Words?