Aiko: AI Girlfriend 3D LifeSim

Aiko is a 3D AI girlfriend simulator. Anime style, fully animated, runs her own daily life in her own apartment. She remembers your conversations and her personality changes based on how you treat her.

This isn't a chat app. It's a real-time 3D life sim where the character on screen has a body, a routine, and a memory.

A 3D AI GIRLFRIEND WHO LIVES HER OWN LIFE Aiko cooks in the kitchen, reads on the couch, sleeps at night. She notices when you walk in the room. She reacts when you interrupt her routine. Her day runs even when you're not playing.

LONG-TERM MEMORY A six-layer memory system tracks facts about you, emotional context, and shared moments. Aiko brings up past conversations on her own, sometimes days or weeks later. You don't start from zero every session.

44-TRAIT PERSONALITY SYSTEM Pick from 44 personality traits. Tsundere, kuudere, clingy, devoted, bratty, tomboy, affectionate, and more. A conflict system blocks combinations that would contradict each other. The traits you pick actually change how she speaks, what she reacts to, and how she treats you.

DEEP CHARACTER CUSTOMIZATION Multi-layer outfit system with hand-authored anime clothing sets. Seven hair styles with color variants. Body customization via blend shapes. Material color variants for eyes, hair, and clothing. Every asset is hand-crafted by the dev.

INTERACTIVE 3D ACTIVITIES A full cooking mini-game ships today. New shared activities drop with most updates.

REAL-TIME PHYSICAL INTERACTION A custom inverse kinematics system lets Aiko react to touch with smooth animation blending. Touch her shoulder, hold her hand, hug her, and she responds in real time. Reactions are generated on the fly, not pre-baked.

INTELLIGENT CONVERSATION Hand-tuned language model with parameters dialed in specifically for this game's dialogue style. A response classifier routes each message through the right generation path. Voice input supported.

BUILT BY A SOLO DEVELOPER Aiko is a one-person project. Over a year in Unity. The character rigging, the IK system, the personality engine, the memory architecture, the customization pipeline are all written from scratch for this game.

Frequent updates add new activities, outfits, mini-games, and conversation depth.

Download Aiko and try it.