Isamu "Kal" Ha is a weapons expert and a military leader of the Eternal Companions. A renowned warrior of Viz-Jun, Isamu has dedicated his life to the ancient techniques of Kehjistani weaponry. He often journeys the realms of Sanctuary to participate and spectate in tournaments, earning him fame and fortune. His reputation proceeds him not only as a fierce competitor but as skilled tactician and strategist in combat. In tournaments, he is known as the Crescent of Viz-Jun.
Isamu a highly skilled fighter in combat and his personality is often described as objectively normal among his peers. Many of his comrades note his nigh-obsession with combat, as he will spectate or participate in any opportunity against friend or foe for a chance to prove his skill.