There seems to be a disparity between the English namings of this show.
On one hand, you have what I assume to be the official English name of Hi Score Girl. This is an interesting choice for me since "Hi" according to Webster's dictionary is "used especially as a greeting". This would mean that the title would be more like Hello Score Girl. For me, this form looks kind of silly.
On the other hand, you have the seemingly unofficial English name of High Score Girl. To me, this makes more sense in relation to the series and its content. Ono is the 'high scoring girl'. Webster's has several diffe…