Knuckles design for the au! Messy ref since it's just to show off the basic design. He's training to be a Spectator of souls much like his relatives. After the queen was killed he was given new orders to protect the prince at all times. He thought it'd be a boring job but turns out Suko makes a good friend to have.
Kirins are second strongest to Unicorns but with them basically going extinct their job is to protect the current and future generations of horse centaurs. Only a small portion of the centaurs are related to the unicorns. You can typically tell when they have a horn when using magic. In this case Suko is part unicorn. Also explaining why his soul is powerful.
