Typically preferring red attire, Kai has tall, thick spiky brown hair, shaped like fire. He is often seen with a focused expression on his face, with a scar visible on his right eyebrow and a bandage above his left, which has been there for a long time, possibly because he thinks it looks cool. Fittingly for his elemental affinity, Kai is very hotheaded and prone to taking action before he thinks things through. He is capable of making careful observations when the need arises. 