LilMilo is an AI companion robot designed to provide responsive, interactive companionship through multimodal perception, expressive movement, and natural language interaction. Built on an advanced language model, it integrates visual, auditory, and tactile sensing to recognize facial expressions, gestures, voices, sound direction, and touch. LilMilo features plush biomimetic fur engineered with millimeter-precision fibers, maintains a comforting 38°C body temperature, and uses expressive eyes, articulated head movement, and high-fidelity vocal interaction to communicate naturally with users. The system adapts over time through ongoing learning, memory-based decision-making, and emotional cognition, allowing it to remember habits and personalize future interactions. With five personality types, seven core emotions expressed across multiple intensity levels, and more than 40 onboard sensors supported by advanced computing hardware, LilMilo is designed to deliver an evolving, emotionally responsive companionship experience.