As stated by others, Hibari is a very scary character with no care for the well-being of others, preferring to do whatever it takes to get what he wants. This often leads to his opponents surprising him, as he doesn't think before attacking. As the head of Namimori Middle's Disciplinary Committee, Hibari uses authority to assault those that get on his nerves, including his own subordinates.

He prefers to be alone, and hates crowdings. This leads him to beat anyone who he thinks is crowding around him too much. He has full confidence in his own strength and power, and dislike to work together with anybody due to feeling bind and restrained, making him refuse or won't easily take suggestions from others into consideration.

A rare trait about him is his love for small animals, ranging from birds to hedgehogs. He is also fiercely loyal to his school and its rules, going so far as to punish others for breaking them even if they aren't students or at the school, such as Genkishi.

He is shown to dislike being indebt to anyone and strives to pay them back as soon as possible. He cannot stand being restrained and absolutely refuses to allow himself to be controlled. Also, earlier in the series he is also shown to have a soft spot for I-Pin, having accepted her Valentine's Day chocolates with a smile and not taking money from Tsuna at a festival upon seeing I-Pin worried.

Future Hibari is shown to be more calm and observant about his opponents, and outwardly admits to hating illusionists because of his grudge towards Mukuro, the first person to have defeated him. His desire to be alone and attack people that annoy him still remains, though his actions are shown with more thought. Future Hibari is also seen being more respectful to Future Tsuna, showing that he has accepted him as his boss.

Voice range: low, to med

Voice type: Bad-Ass, can be insecure, Cool-Guy

I'm flexible when it comes to Kyoya's voice, you can get a little creative with him.

For those of you who still need reference, try using this as a base:

https://www.youtube.com/watch?v=uMxYHIFT4jA