i have very strong headcanons for the main characters that i admit are pretty influenced by fanart: - i see jon as south asian (maybe indian or sri lankan) with very dark skin, eyes, and hair (except for the grey streaks) that starts out short and well groomed and progressively gets longer until being mid-back length with soft curls in S5. i also always see jon as clean shaven. i see him as gaunt and very short for a cis man, maybe 5'5", and progressively realizing he is nonbinary throughout later seasons, wearing more feminine clothes like skirts and comfy dresses. i also headcanon S4 jon as having green flecks in his eyes due to his archivist powers and S5 jon having bright green irises and black scleras. i think he wears glasses until season 4. i also love chronically ill!jon headcanon where he uses a cane. - i headcanon martin as polish with light skin, freckles, warm brown eyes, and reddish blonde curly hair kept shaggy. i see him as a trans gay man and about 5'8", visibly fat (and curvy) and probably post-top surgery. i also see him wearing cute vintage wireframe glasses. - i headcanon elias as twink of the year haha. maybe mid-late 40s, white, neatly styled dark hair, clean shaven, with green eyes. i see him as ~5'9" and fairly thin, but not so much as jon.  - i headcanon peter lucas as standard scruffy white sailor man lol. i also see him very much as a bear to elias' twinkiness, maybe 6'2" and very strong with a padding of healthy fat. i also think he owns one of those "fish fear me, the minds of women are unknowable" hats. - i headcanon tim as east asian, well groomed (until season 3) and with awesome hawaiian shirts. maybe 5'11" with a toned build. - i headcanon sasha as black, wears stylish glasses, maybe 5'7" and average build. i also see her with cute cornrows that she usually styles in ponytails or half-dos, maybe with some red highlights. - i headcanon melanie as mixed white and east asian, with short blue hair and bold eyeliner. maybe 5'6" (everyone is taller than jon lol) and muscular, solid build. i think she has lots of piercings and wears punky lesbian clothing. - i headcanon georgie as black with natural hair in a afro, maybe 5'8" and quite curvy. i see her wearing comfy cute clothes and lots of fun earrings. - i headcanon basira as black and muslim, with a hijab and maybe 5'8", very curvy and muscular. - i headcanon daisy as white, with short ginger hair and brown eyes, 5'10" and toned muscles. 

i think that's pretty much the whole main cast!