While we're waiting for the knowledgeable people...

1. I think these are pretty much the same Faber pencils I used to use as a kid: Faber-Castell Polychromos Colored Pencil Sets. They're about $1.50 a pencil (plus shipping, if you order online). I'm seldom in brick-and-mortar art supply stores any more but they used to be really widely available. You could use them dry, or if you went over a colored area with a wet brush it would basically turn into watercolor.

2. When I needed intensely-colored pens (not pencils) some years ago, I discovered the Tombow line. The "dual brush pen" has a fine tip at one end and a broader one at the other. It's supposed to come in 96 colors and costs about double what the Faber-Castell pencils do.

Good luck, Kaika, and let us know what you find that works better for you than these.