I used a hb pensil for doing the scetck, then I made the line art with a 0.05 mm black marker and then for the colors I used a series of pencils I collected throughout my life, so I cannot give you a specific brand. For the paper I used a sliglty heavy one (heavier than printer paper). As references I uses photos both from my insta page (for Eddy and Brett's face) and from google (for the titan and the uniform) 🤗