Hinata

Hinata is the daughter of Hinowa who took her mother's name after she died. She uses a single sword style, same as Akame and often trained with her partner, Tobari. She took care of Akame when she washed ashore and received swordsmanship training from her as a token of gratitude.

Akame
Hinata rescue Akame and tend her wounds when she was washed ashore. She even let Akame stay in her house and in exchange Akame train Hinata swordmanship due to the similar sword style (1 Sword Style). Later, Hinata takes Akame to Elder and she learned that Akame has come to his land to search a way to undo the curse that was put into her body and also finding th best possible way to undo someone that was turned into such (in this case, Tatsumi that has been transformed into Tyrant).