The engineering team developed a multi-jointed endoskeleton for the alien sex doll, enabling natural movement of non-human features like tentacles and wings. Hentai sex dolls, on the other hand, focus on the precise rendering of facial expressions, recreating the distinctive anime-inspired highlights in eyes and gradient hair color through specialized coating technology. Consumer feedback indicates that alien sex doll users particularly appreciate the faithful reproduction of the imaginary creatures, while hentai sex doll collectors prioritize the detailed reproduction of clothing and accessories. The differing emphasis on material development for these two product lines perfectly meets consumers’ dual pursuits of fantasy and reality.