Of unintimidating physical proportions, Arthur cuts a lean, tallish figure of a man, with lightly tanned skin, and prematurely greying hair often kept in check by a simple leather headband. Bright green eyes and an easy smile compliment a relaxed attitude to life, and an upperclass accent hints at refinement, or a penchant for the arts.

Generally dressed in well-tailored but simple and comfortable clothes, and a tendency to lean against whatever upright structure he happens to find himself near, he appears approachable and difficult to phase.