Ink and line multi use pen with rectangle textures. Good to draw anything for lineart & cel shading or to add texture.
The pen I've been using in a lot of my illustrations recently. Good for line art, coloring, and textures.
The below image was drawn only with Raiku Pen, airbrush, and blur tool. This is best for sketching, doodling or cel shaded coloring (or to add a unique texture)