Mordecai: Having thoroughly fucked things up before, he has been freed from his bindings after centuries, and he is going to use this new chance to become a better person and try to make up for a fraction of the harm he'd cause before.
Moriko: This 36 year old half-elf is a martial disciple of the Goddess of Passions and her love/passion for fighting puts most shonen protags to shame, but unlike them, she also loves to indulge in much more earthy passions; there's nothing shy about her.
Kazue: A 20 year kitsune and shrine maiden reincarnated as a spiritual nexus (i.e. dungeon core), she is smart, outgoing, intelligent, easily distracted and flustered, and has a head filled with dirty romance books shared by her fellow shrine maidens, which has nothing to do with her accepting Mordecai and Moriko into her life so happily, really.