Ruv tends to be introverted and not interact with other people. The only person he likes to interact with is Sarvente only. Ruv will never leave Sarvente's side and will always be close towards her, they canonically cannot be separated.
Despite being shy around strangers, he seems to have a near-emotionless mindset, sociopathic tendencies, and extreme hostility against people he does not like or any stranger in general. If he wants to kill or hurt someone, he will not hesitate to do so.