You can add party members though
yes, but they still feels more of a summon rather than a companion. By companion, I envision it more of someone who will travel with us from start to finish, play it's assigned role, have a more complex interactive system like changing cloths or getting tied up, and doesn't die but rather be like us, getting kidnapped. But after I think about it again, I feels like it will need a whole new and more advanced AI so it might be impossible