Adderfang, then known as Adder, lived as a rogue for much of his life. His parents were reasonable- he was an only child, so they focused their attention on him and trained him well in the arts of battle and survival. When he felt ready to do so, he left for the wider world and to seek out a home of his own.

On his travels, Adder met many a cat and challenged several to battle, mostly resulting in a loss on his part due to his hubris. By the time his path crossed that of Dawnclan, he was getting older, and was lured in by the promise of no longer having to hunt for his own food. He lives life as an elder in all but name; the only clan activity he participates in is battle training, teaching the apprentices how to hold their own even when injured or facing what appears to be an impossible opponent.

Adderfang is a tom of average height, being on the taller end of cats in the clan, but only slightly. He is a little on the skinny side but this is hidden by his thick fur, which is often matted and unkempt due to his disregard for personal appearance.

As a result of his frequent skirmishes as a younger cat, his fur is riddled with numerous scars, though rarely do they make an appearance since his fur covers them well.