Sosugu’s breasts were shown when she and the others were forced by Dabada to do a strip show, though. Plus, you know, harem context.
@Equilibrium
It’s the cost and efficiency conundrum, since the most he could do with her was apparently to just get a bit drunk every night. A hoe tsukumogami actually has straightforward combat applications despite being a hoe, putting aside its practical utility as a hoe.
It’s like Kiriha and how she shouldn’t have been all that powerful a tsukumogami until after Kanaka utilized her. For Sosugu, I think she’d just be naturally strengthened over time, being supplied with Mayoiga’s spiritual power, allowing her to gradually discover and expand her capabilities to what they are now.