Lujon

Lujon appears only in the 2003 anime continuity. He is a young village physician who leans on medicinal alchemy, and his face happens to resemble the man who once created Lust, a coincidence that shapes his entire fate.

He is earnest and driven, pouring himself into finding a cure for the plague choking his hometown. That same intensity curdles into obsession where love is concerned. He abandons his devoted fiancee at the altar for the mysterious woman who empowered him, then chases her across the country, blind to the fact that she feels nothing for him.

Lujon begins as a struggling young doctor studying medicinal alchemy in the hope of beating a local affliction called the Fossil Disease. Lust takes an interest in him because his features recall the lover of her original human self, and she schools him in more advanced techniques while slipping him a counterfeit Philosopher's Stone. With it he achieves the first real cure, saving his fiancee Lydia, but he also falls for Lust. On the day he is meant to wed Lydia, he walks out to declare his feelings to the Homunculus, who has no interest in staying and sends him after the heartbroken bride. Once Lust departs, the fake stone's power drains away and the disease returns, driving him to search for her and a replacement. He finds her again, and she swaps out his stone for her own ends. Back in the village he professes his love one final time, and she kills him without a flicker of feeling, calling him nothing more than a failed experiment, since she and Envy had wanted him desperate enough to forge a genuine Philosopher's Stone. His stone shatters, the disease petrifies him, and it wipes out the whole town in an instant. Lydia arrives with the Elric brothers and Winry Rockbell to find his fossilized corpse, and she dies clutching him.