yes gam and kar are moirails. vvris and nep are matesprits too wwhich is fine as long as i get to wwatch.
here i made a diagram for you land dww*llers to make it easier for you.

terezi wwas part of the poly matespritship but wwas kicked out because she couldnt hang.
dont feel like gettin into it its a wwhole lot a drama. shes still oomf tho.

my life is pretty storied and wwonderful you can find me on tumblr as girleridanofficial for required readin.