Board Thread:Off Topic/@comment-27447621-20180223225208/@comment-25396609-20180930050638

The guy with the spear/dagger pen has a similar Semblance. He can create and control an ink-like substance at will. The reason the blade on his weapon is shaped like a fountain pen is that he generates ink using his Semblance and funnels it through his weapon, combining it with the Dust in the revolving cylinder allowing him to create complicated formations from Dust.

Rather than using it to create weapons, he has practiced his control to the point he can essentially use his Semblance to sketch three dimensional objects in the air around him more or less by thought, then set off the Dust to turn the outlines he maps out into solid objects.

It can also be used to mark any surface, making it good for taking notes (he is a very scholarly sort, he's pretty much always got a notebook in hand to write down his observations of people and things around him), and even giving people Dust infused tattoos.