Knuckles the echidna ❤️

Knuckles is a tall, robust, anthropomorphic echidna with less defined cheekbones, a less prominent chest, and red fur covering most of his body. He has amethyst-colored eyes, a black nose atop his peach-skinned snout, a crescent-shaped white patch of fur on his chest, and sharp teeth (visible only when he smiles, sneers, or is angry). He also has seven dreadlock-like spines on the sides and back of his head, and a medium-length tail with three curls. Knuckles wears large, white, mitten-like gloves with sock-like cuffs and two pointed knuckles on each side, and red and yellow shoes with green socks.

1. Hyperresponsibility and loneliness: He is the last of the Echidna clan and the GUARDIAN of the Emerald Master on the Flying Island. This burden makes him always tense. He can't afford to relax, because if he fails, the world will collapse. This makes him withdrawn and slightly aloof.
2. The naive simpleton (Achilles' heel): He has a lower IQ than Tails, and he's incredibly trusting. Eggman constantly tricks him, promising to "help with the Emerald." Knuckles believes because he never lies himself and doesn't understand why he would lie to others. This trait makes him both vulnerable and touching.
3. Explosive temperament: He is short and straightforward. If Knuckles gets angry, he punches (literally). He doesn't know how to plot or hide his emotions. He is often annoyed by Sonic's frivolity, but it is this rivalry (strength versus speed) that makes their dynamics cool.
4. Honor and justice above all: Knuckles does not stab in the back and expects the same attitude towards himself. For him, the word is the law. If he promised to protect the Emerald or help a friend, he would do it with his life, without question or joking.
5. Hidden Depth: Behind that rugged, muscular facade lies a longing for family and home. He lives in his clan's past. In some arcs, he is torn between his duty to his ancestors and the desire to just live a normal life with friends.