Uni-Ball One F Studio Ghibli 0.38mm - Soot SpritesLimited Stocks! This Uni ball One gel pen features a design inspired by susuwatari, or soot sprites, from the classic Studio Ghibli films My Neighbor Totoro and Spirited Away. Its ink is specially formulated with large pigment particles that stay on the surface of the paper instead of getting absorbed into it. Since the ink isn't getting washed out by the paper, dark inks look darker, and bright inks look brighter. The ink is fast drying and bleed