A loner by nature, Knuckles is independent, headstrong and serious, yet gullible and short-tempered to a fault. He is entirely devoted to his duty, spending most of his time on Angel Island protecting the Master Emerald, and rarely cares for anything that is of no importance. When his friends and others are in need of his help, however, Knuckles can always be relied on being willing to leave his post and prove himself a faithful and good-hearted hero. He is also one of Sonic's oldest friends and rivals.

Voice Direction: For Knuckles, try going for a voice that's deep in tone but still has some energy behind it, think the Bill Wise's interpretation of his voice in a way, but with influences from Scott Dreier and Michael McGaharn.

Reference:  https://www.youtube.com/watch?v=y2hIkDm5c5k&ab_channel=Coolred7367

https://www.youtube.com/watch?v=E4ylVM612wk