The first heroine is Lily: A slime. At first, she is just a simple slime, her power is "Copy", she can copy completely (although weaker) living object she eats. Takahiro and Lily then found the corpse of Mizushima Miho, one of a student from Takahiro school. Miho killed herself to protect her dignity from being raped. He asked Lily to process Miho body, which result in Lily gaining Miho appearance and memory. Lily is a cheerful and beautiful girl, also a big-sister figure in the family. Deep down, she is envious to Katou Mana, another girl student who travelled along with them. The reason of her envy is caused by the complex of "not-fully human" despite taking the form of human, and she is scared of being abandoned by Takahiro. After the confrontation against Mana, it is hinted she is slowly taking the personality of Miho.
The second heroine is Rose: A magical puppet. Her appearance is a boorish wooden mannequin with no face. Her ability is "Magic Smithing", she can create weapons, armors, and forged them with magic. She is calm and very diligent, a sport / military type. Respect Lily as her big sister. She lack understanding of humans emotion but grow to learn more of it. Mana teach her to understand about "desire and wish" as part of being human. Rose admitted to Mana, she wishes to be hugged by Takahiro, Mana then supports her by saying that she only have to be cuter. By the way, at first Rose cannot talk, because she doesn't have vocal organ. Then she created it to answer Takahiro wishes to speak with her.
The third heroine is Gerbera: An Arachne. High monster, taking the form of half woman-half spider, with white as her color, and red as her eyes color. At first she is the enemy of Takahiro and "his family", intended to monopolize Takahiro for herself, but Mana confronts her directly and told her that being happy is not only "to love but also be loved back". A sweet childish female who tried her best to learn things other than violence. The type to easily let her mind slip from her mouth, and then getting embarassed by it.
That's the current heroines. Everyone is so cute~ Lily's jealousy is adorable, Rose effort to change her form closer to human and became cute, is adorable. Gerbera's embarassed moments is adorable hau~ hau~~