Coloured pencil? Pastel? Charcoal? Water colour? Ink?
They are all good choices… and will depend on your own personal preferences and how you “see” the subject.
Charcoal
Produces a classic image. “Less is more”
Charcoal
Produces a classic image. “Less is more”
Water Colour
has rich transparent colours, and seems to create a "glow"
Coloured Pencil
will have vivid colours. The grain of the paper may add slight texture. Features and details can be quite precise
Pastel chalk
comes in a wide range of very rich and juicy colours. It allows very smooth blending and usually has a softer more painterly look, with broader strokes.
Ink Drawings
can capture a likeness in a less conventional way. Ink drawings are bold yet minimalist. Ink works well for adult subjects, and house portraits.