Rui Kamishiro is a big fluffy cat, his big mass is mainly fur. Rui is an extremely needy and clingy cat, meowing constantly for attention and purring loudly once he receives it. Rui enjoys messing around with the electronics in his owner’s, Tsukasa Tenma's house, which usually ends with Rui getting scolded. Rui hates baths and starts hissing and scratching when in contact with water, he does the same with vegetables. Loves sleeping in Tsukasa’s lap or anywhere that smells like him.