Hamaji grew up alongside Shino and Sosuke—she's essentially their sister. The three of them survived the destruction of Otsuka Village together, which bonded them for life.
She's obsessed with health and nutrition, constantly pestering everyone around her to eat right. The problem is, despite her genuine concern, her cooking is pretty terrible. It's a running gag that creates friction with the people she's trying to help.
There's a disconnect between how she looks and how she acts. She's got an attractive appearance, but she's manipulative with Shino and Sosuke, playing them against each other or using them to her advantage. Still, it's clear she actually cares about them underneath it all—her pushiness comes from a place of genuine affection, even if it doesn't always feel that way.
Kaname seems to have romantic feelings for her, though the series hasn't really explored or resolved that tension.
Content compiled by AnimeList.moe from publicly available sources.
