It's pretty amusing to see other people's impressions of the characters. The Bhikkhuni cast in this case
In terms of personality
Rinka: Asuka from Senran Kagura
Ranka: siscon lesbian that only cared about Rinka at first but befriends other characters
Momo: edgy brat that can't go one sentence without telling another character that she'll kill them, gets de-edged halfway through the story and becomes friends with Rinka, Ranka and Manpukumaru
Mana: Starts off as a gentle girl that helps everyone out in day to day tasks but due to Momo being extremely uncooperative as a partner she's forced to go partner hunting and goes power hungry over the course of the story, trying to climb through the ranks no matter the means
Manpukumaru: wild card of the story, partners up with anyone for food and befriends Momo. Surprisingly funny most of the time unlike Minori from Senran Kagura despite sharing her obsession with food.
Viola: Acts like a queen because she's "Elite", obsessed with Koharu who is her rival but secretly (well not really secret) just has a lesbian boner for her.
Koharu: Top of the class student, class rep type character that's an extreme lawfag that values peace above all else and for part of the story searches for a partner strong enough to use her power to the fullest. Eventually partners with Viola.
Echigoya: non playable character that's the merchant, has plenty of dialogue in the story.