The nib is a heart, but when I played with it in various ways, it became like a cross-hatching and was surprisingly easy to use, so I divided it.
If you want to make it a little thicker, I think you can do it by repeating copy and paste.
ペン先はハートですが色々弄ったらかけあみのようになって意外と使いやすかったのでおすそ分けです
もう少し濃くしたいなと思ったらコピペを繰り返していただければできるかと思います