Responses

it's a really common racist stereotype in manga with foreign and especially darker skined characters. ie the author is racist and thinks all Africans are stupid so they write the character as stupid. the aggresive stereotype comes from the notion that "the big brown man will rape the small frail white/pale woman'' in context it usual is shown with sexual assault in manga. this manga didn't show Luca as either which is better
they gave Luca a straight nose uhhhhh ;( while the author did all the research on Masai but couldn't draw black noses