Moro is associated with Tampere. Hei, moi, terve etc all work for one or many.
minä - me
sinä - you
hän - s/he
me - us
te - y’all
he - them
Of course word like minä actually is also minun, minua, minut, minussa, minusta, minuun, minulla, minulta, minulle, minuna, minuksi & (minutta) + regional and slang variations. Like I would say mää as I am from the west the more common southern word mä has invaded most of the country.