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Tri-one is illuminative light robot to produce a space.The robot senses temperature, user's condition, action. and lights various luminance,colors,changes one's shapes.Also Tri-one is one with multiple.By situation, they do automatically being separate, getting together by sensed data. Through these, robot acts not only passively but actively as if they had Emotion.By doing so, robots are able to give something to users from robots.This is a real meaning of interactive communication between robot and human.