The word "heroine" is written out in English (with kana alphabet) so it just means a main female character
"Hinata is not like the typical heroine that would stand by the protagonist's side, she's the type to watch him from the shadows" (the type to secretly watch over him)
"Hinata is not like the typical heroine that would stand by the protagonist's side, she's the type to watch him from the shadows" (the type to secretly watch over him)