Two slots coz that's a lot of work
Not first come first serve, post a clear reference (where I can see their face properly at min). Can also be a written reference, but a few pointers on that;
"Blue eyes, blond hair" tells me nothing.A better ref would be for example; "Almond shaped eyes angled slightly downwards, light blue /almost gray with an inner ring of light green around the pupil, High portruding cheekbones, a strong jaw, almost a square shaped head" etc etc.
If I have done a portrait of your characters before, I won't do yours out of being fair. If it's been a sketch however, I may consider.